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diff --git a/src/regex/re.rs.html b/src/regex/re.rs.html new file mode 100644 index 0000000..3472b45 --- /dev/null +++ b/src/regex/re.rs.html @@ -0,0 +1,2393 @@ +<!DOCTYPE html> +<html lang="en"> +<head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1.0"> + <meta name="generator" content="rustdoc"> + <meta name="description" content="Source to the Rust file `/home/travis/.cargo/registry/src/github.com-0a35038f75765ae4/regex-0.1.38/src/re.rs`."> + <meta name="keywords" content="rust, rustlang, rust-lang"> + + <title>re.rs.html -- source</title> + + <link rel="stylesheet" type="text/css" href="../../main.css"> + + <link rel="shortcut icon" href="http://www.rust-lang.org/favicon.ico"> + +</head> +<body class="rustdoc"> + <!--[if lte IE 8]> + <div class="warning"> + This old browser is unsupported and will most likely display funky + things. + </div> + <![endif]--> + + + + <section class="sidebar"> + <a href='../../regex/index.html'><img src='http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='' width='100'></a> + + </section> + + <nav class="sub"> + <form class="search-form js-only"> + <div class="search-container"> + <input class="search-input" name="search" + autocomplete="off" + placeholder="Click or press 'S' to search, '?' for more options..." + type="search"> + </div> + </form> + </nav> + + <section id='main' class="content source"><pre class="line-numbers"><span id="1"> 1</span> +<span id="2"> 2</span> +<span id="3"> 3</span> +<span id="4"> 4</span> +<span id="5"> 5</span> +<span id="6"> 6</span> +<span id="7"> 7</span> +<span id="8"> 8</span> +<span id="9"> 9</span> +<span id="10"> 10</span> +<span id="11"> 11</span> +<span id="12"> 12</span> +<span id="13"> 13</span> +<span id="14"> 14</span> +<span id="15"> 15</span> +<span id="16"> 16</span> +<span id="17"> 17</span> +<span id="18"> 18</span> +<span id="19"> 19</span> +<span id="20"> 20</span> +<span id="21"> 21</span> +<span id="22"> 22</span> +<span id="23"> 23</span> +<span id="24"> 24</span> +<span id="25"> 25</span> +<span id="26"> 26</span> +<span id="27"> 27</span> +<span id="28"> 28</span> +<span id="29"> 29</span> +<span id="30"> 30</span> +<span id="31"> 31</span> +<span id="32"> 32</span> +<span id="33"> 33</span> +<span id="34"> 34</span> +<span id="35"> 35</span> +<span id="36"> 36</span> +<span id="37"> 37</span> +<span id="38"> 38</span> +<span id="39"> 39</span> +<span id="40"> 40</span> +<span id="41"> 41</span> +<span id="42"> 42</span> +<span id="43"> 43</span> +<span id="44"> 44</span> +<span id="45"> 45</span> +<span id="46"> 46</span> +<span id="47"> 47</span> +<span id="48"> 48</span> +<span id="49"> 49</span> +<span id="50"> 50</span> +<span id="51"> 51</span> +<span id="52"> 52</span> +<span id="53"> 53</span> +<span id="54"> 54</span> +<span id="55"> 55</span> +<span id="56"> 56</span> +<span id="57"> 57</span> +<span id="58"> 58</span> +<span id="59"> 59</span> +<span id="60"> 60</span> 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598</span> +<span id="599"> 599</span> +<span id="600"> 600</span> +<span id="601"> 601</span> +<span id="602"> 602</span> +<span id="603"> 603</span> +<span id="604"> 604</span> +<span id="605"> 605</span> +<span id="606"> 606</span> +<span id="607"> 607</span> +<span id="608"> 608</span> +<span id="609"> 609</span> +<span id="610"> 610</span> +<span id="611"> 611</span> +<span id="612"> 612</span> +<span id="613"> 613</span> +<span id="614"> 614</span> +<span id="615"> 615</span> +<span id="616"> 616</span> +<span id="617"> 617</span> +<span id="618"> 618</span> +<span id="619"> 619</span> +<span id="620"> 620</span> +<span id="621"> 621</span> +<span id="622"> 622</span> +<span id="623"> 623</span> +<span id="624"> 624</span> +<span id="625"> 625</span> +<span id="626"> 626</span> +<span id="627"> 627</span> +<span id="628"> 628</span> +<span id="629"> 629</span> +<span id="630"> 630</span> +<span id="631"> 631</span> +<span id="632"> 632</span> +<span id="633"> 633</span> +<span id="634"> 634</span> +<span id="635"> 635</span> +<span id="636"> 636</span> +<span id="637"> 637</span> +<span id="638"> 638</span> +<span id="639"> 639</span> +<span id="640"> 640</span> +<span id="641"> 641</span> +<span id="642"> 642</span> +<span id="643"> 643</span> +<span id="644"> 644</span> +<span id="645"> 645</span> +<span id="646"> 646</span> +<span id="647"> 647</span> +<span id="648"> 648</span> +<span id="649"> 649</span> +<span id="650"> 650</span> +<span id="651"> 651</span> +<span id="652"> 652</span> +<span id="653"> 653</span> +<span id="654"> 654</span> +<span id="655"> 655</span> +<span id="656"> 656</span> +<span id="657"> 657</span> +<span id="658"> 658</span> +<span id="659"> 659</span> +<span id="660"> 660</span> +<span id="661"> 661</span> +<span id="662"> 662</span> +<span id="663"> 663</span> +<span id="664"> 664</span> +<span id="665"> 665</span> +<span id="666"> 666</span> +<span id="667"> 667</span> +<span id="668"> 668</span> +<span id="669"> 669</span> +<span id="670"> 670</span> +<span id="671"> 671</span> +<span id="672"> 672</span> +<span id="673"> 673</span> +<span id="674"> 674</span> +<span id="675"> 675</span> +<span id="676"> 676</span> +<span id="677"> 677</span> +<span id="678"> 678</span> +<span id="679"> 679</span> +<span id="680"> 680</span> +<span id="681"> 681</span> +<span id="682"> 682</span> +<span id="683"> 683</span> +<span id="684"> 684</span> +<span id="685"> 685</span> +<span id="686"> 686</span> +<span id="687"> 687</span> +<span id="688"> 688</span> +<span id="689"> 689</span> +<span id="690"> 690</span> +<span id="691"> 691</span> +<span id="692"> 692</span> +<span id="693"> 693</span> +<span id="694"> 694</span> +<span id="695"> 695</span> +<span id="696"> 696</span> +<span id="697"> 697</span> +<span id="698"> 698</span> +<span id="699"> 699</span> +<span id="700"> 700</span> +<span id="701"> 701</span> +<span id="702"> 702</span> +<span id="703"> 703</span> +<span id="704"> 704</span> +<span id="705"> 705</span> +<span id="706"> 706</span> +<span id="707"> 707</span> +<span id="708"> 708</span> +<span id="709"> 709</span> +<span id="710"> 710</span> +<span id="711"> 711</span> +<span id="712"> 712</span> +<span id="713"> 713</span> +<span id="714"> 714</span> +<span id="715"> 715</span> +<span id="716"> 716</span> +<span id="717"> 717</span> +<span id="718"> 718</span> +<span id="719"> 719</span> +<span id="720"> 720</span> +<span id="721"> 721</span> +<span id="722"> 722</span> +<span id="723"> 723</span> +<span id="724"> 724</span> +<span id="725"> 725</span> +<span id="726"> 726</span> +<span id="727"> 727</span> +<span id="728"> 728</span> +<span id="729"> 729</span> +<span id="730"> 730</span> +<span id="731"> 731</span> +<span id="732"> 732</span> +<span id="733"> 733</span> +<span id="734"> 734</span> +<span id="735"> 735</span> +<span id="736"> 736</span> +<span id="737"> 737</span> +<span id="738"> 738</span> +<span id="739"> 739</span> +<span id="740"> 740</span> +<span id="741"> 741</span> +<span id="742"> 742</span> +<span id="743"> 743</span> +<span id="744"> 744</span> +<span id="745"> 745</span> +<span id="746"> 746</span> +<span id="747"> 747</span> +<span id="748"> 748</span> +<span id="749"> 749</span> +<span id="750"> 750</span> +<span id="751"> 751</span> +<span id="752"> 752</span> +<span id="753"> 753</span> +<span id="754"> 754</span> +<span id="755"> 755</span> +<span id="756"> 756</span> +<span id="757"> 757</span> +<span id="758"> 758</span> +<span id="759"> 759</span> +<span id="760"> 760</span> +<span id="761"> 761</span> +<span id="762"> 762</span> +<span id="763"> 763</span> +<span id="764"> 764</span> +<span id="765"> 765</span> +<span id="766"> 766</span> +<span id="767"> 767</span> +<span id="768"> 768</span> +<span id="769"> 769</span> +<span id="770"> 770</span> +<span id="771"> 771</span> +<span id="772"> 772</span> +<span id="773"> 773</span> +<span id="774"> 774</span> +<span id="775"> 775</span> +<span id="776"> 776</span> +<span id="777"> 777</span> +<span id="778"> 778</span> +<span id="779"> 779</span> +<span id="780"> 780</span> +<span id="781"> 781</span> +<span id="782"> 782</span> +<span id="783"> 783</span> +<span id="784"> 784</span> +<span id="785"> 785</span> +<span id="786"> 786</span> +<span id="787"> 787</span> +<span id="788"> 788</span> +<span id="789"> 789</span> +<span id="790"> 790</span> +<span id="791"> 791</span> +<span id="792"> 792</span> +<span id="793"> 793</span> +<span id="794"> 794</span> +<span id="795"> 795</span> +<span id="796"> 796</span> +<span id="797"> 797</span> +<span id="798"> 798</span> +<span id="799"> 799</span> +<span id="800"> 800</span> +<span id="801"> 801</span> +<span id="802"> 802</span> +<span id="803"> 803</span> +<span id="804"> 804</span> +<span id="805"> 805</span> +<span id="806"> 806</span> +<span id="807"> 807</span> +<span id="808"> 808</span> +<span id="809"> 809</span> +<span id="810"> 810</span> +<span id="811"> 811</span> +<span id="812"> 812</span> +<span id="813"> 813</span> +<span id="814"> 814</span> +<span id="815"> 815</span> +<span id="816"> 816</span> +<span id="817"> 817</span> +<span id="818"> 818</span> +<span id="819"> 819</span> +<span id="820"> 820</span> +<span id="821"> 821</span> +<span id="822"> 822</span> +<span id="823"> 823</span> +<span id="824"> 824</span> +<span id="825"> 825</span> +<span id="826"> 826</span> +<span id="827"> 827</span> +<span id="828"> 828</span> +<span id="829"> 829</span> +<span id="830"> 830</span> +<span id="831"> 831</span> +<span id="832"> 832</span> +<span id="833"> 833</span> +<span id="834"> 834</span> +<span id="835"> 835</span> +<span id="836"> 836</span> +<span id="837"> 837</span> +<span id="838"> 838</span> +<span id="839"> 839</span> +<span id="840"> 840</span> +<span id="841"> 841</span> +<span id="842"> 842</span> +<span id="843"> 843</span> +<span id="844"> 844</span> +<span id="845"> 845</span> +<span id="846"> 846</span> +<span id="847"> 847</span> +<span id="848"> 848</span> +<span id="849"> 849</span> +<span id="850"> 850</span> +<span id="851"> 851</span> +<span id="852"> 852</span> +<span id="853"> 853</span> +<span id="854"> 854</span> +<span id="855"> 855</span> +<span id="856"> 856</span> +<span id="857"> 857</span> +<span id="858"> 858</span> +<span id="859"> 859</span> +<span id="860"> 860</span> +<span id="861"> 861</span> +<span id="862"> 862</span> +<span id="863"> 863</span> +<span id="864"> 864</span> +<span id="865"> 865</span> +<span id="866"> 866</span> +<span id="867"> 867</span> +<span id="868"> 868</span> +<span id="869"> 869</span> +<span id="870"> 870</span> +<span id="871"> 871</span> +<span id="872"> 872</span> +<span id="873"> 873</span> +<span id="874"> 874</span> +<span id="875"> 875</span> +<span id="876"> 876</span> +<span id="877"> 877</span> +<span id="878"> 878</span> +<span id="879"> 879</span> +<span id="880"> 880</span> +<span id="881"> 881</span> +<span id="882"> 882</span> +<span id="883"> 883</span> +<span id="884"> 884</span> +<span id="885"> 885</span> +<span id="886"> 886</span> +<span id="887"> 887</span> +<span id="888"> 888</span> +<span id="889"> 889</span> +<span id="890"> 890</span> +<span id="891"> 891</span> +<span id="892"> 892</span> +<span id="893"> 893</span> +<span id="894"> 894</span> +<span id="895"> 895</span> +<span id="896"> 896</span> +<span id="897"> 897</span> +<span id="898"> 898</span> +<span id="899"> 899</span> +<span id="900"> 900</span> +<span id="901"> 901</span> +<span id="902"> 902</span> +<span id="903"> 903</span> +<span id="904"> 904</span> +<span id="905"> 905</span> +<span id="906"> 906</span> +<span id="907"> 907</span> +<span id="908"> 908</span> +<span id="909"> 909</span> +<span id="910"> 910</span> +<span id="911"> 911</span> +<span id="912"> 912</span> +<span id="913"> 913</span> +<span id="914"> 914</span> +<span id="915"> 915</span> +<span id="916"> 916</span> +<span id="917"> 917</span> +<span id="918"> 918</span> +<span id="919"> 919</span> +<span id="920"> 920</span> +<span id="921"> 921</span> +<span id="922"> 922</span> +<span id="923"> 923</span> +<span id="924"> 924</span> +<span id="925"> 925</span> +<span id="926"> 926</span> +<span id="927"> 927</span> +<span id="928"> 928</span> +<span id="929"> 929</span> +<span id="930"> 930</span> +<span id="931"> 931</span> +<span id="932"> 932</span> +<span id="933"> 933</span> +<span id="934"> 934</span> +<span id="935"> 935</span> +<span id="936"> 936</span> +<span id="937"> 937</span> +<span id="938"> 938</span> +<span id="939"> 939</span> +<span id="940"> 940</span> +<span id="941"> 941</span> +<span id="942"> 942</span> +<span id="943"> 943</span> +<span id="944"> 944</span> +<span id="945"> 945</span> +<span id="946"> 946</span> +<span id="947"> 947</span> +<span id="948"> 948</span> +<span id="949"> 949</span> +<span id="950"> 950</span> +<span id="951"> 951</span> +<span id="952"> 952</span> +<span id="953"> 953</span> +<span id="954"> 954</span> +<span id="955"> 955</span> +<span id="956"> 956</span> +<span id="957"> 957</span> +<span id="958"> 958</span> +<span id="959"> 959</span> +<span id="960"> 960</span> +<span id="961"> 961</span> +<span id="962"> 962</span> +<span id="963"> 963</span> +<span id="964"> 964</span> +<span id="965"> 965</span> +<span id="966"> 966</span> +<span id="967"> 967</span> +<span id="968"> 968</span> +<span id="969"> 969</span> +<span id="970"> 970</span> +<span id="971"> 971</span> +<span id="972"> 972</span> +<span id="973"> 973</span> +<span id="974"> 974</span> +<span id="975"> 975</span> +<span id="976"> 976</span> +<span id="977"> 977</span> +<span id="978"> 978</span> +<span id="979"> 979</span> +<span id="980"> 980</span> +<span id="981"> 981</span> +<span id="982"> 982</span> +<span id="983"> 983</span> +<span id="984"> 984</span> +<span id="985"> 985</span> +<span id="986"> 986</span> +<span id="987"> 987</span> +<span id="988"> 988</span> +<span id="989"> 989</span> +<span id="990"> 990</span> +<span id="991"> 991</span> +<span id="992"> 992</span> +<span id="993"> 993</span> +<span id="994"> 994</span> +<span id="995"> 995</span> +<span id="996"> 996</span> +<span id="997"> 997</span> +<span id="998"> 998</span> +<span id="999"> 999</span> +<span id="1000">1000</span> +<span id="1001">1001</span> +<span id="1002">1002</span> +<span id="1003">1003</span> +<span id="1004">1004</span> +<span id="1005">1005</span> +<span id="1006">1006</span> +<span id="1007">1007</span> +<span id="1008">1008</span> +<span id="1009">1009</span> +<span id="1010">1010</span> +<span id="1011">1011</span> +<span id="1012">1012</span> +<span id="1013">1013</span> +<span id="1014">1014</span> +<span id="1015">1015</span> +<span id="1016">1016</span> +<span id="1017">1017</span> +<span id="1018">1018</span> +<span id="1019">1019</span> +<span id="1020">1020</span> +<span id="1021">1021</span> +<span id="1022">1022</span> +<span id="1023">1023</span> +<span id="1024">1024</span> +<span id="1025">1025</span> +<span id="1026">1026</span> +<span id="1027">1027</span> +<span id="1028">1028</span> +<span id="1029">1029</span> +<span id="1030">1030</span> +<span id="1031">1031</span> +<span id="1032">1032</span> +<span id="1033">1033</span> +<span id="1034">1034</span> +<span id="1035">1035</span> +<span id="1036">1036</span> +<span id="1037">1037</span> +<span id="1038">1038</span> +<span id="1039">1039</span> +<span id="1040">1040</span> +<span id="1041">1041</span> +<span id="1042">1042</span> +<span id="1043">1043</span> +<span id="1044">1044</span> +<span id="1045">1045</span> +<span id="1046">1046</span> +<span id="1047">1047</span> +<span id="1048">1048</span> +<span id="1049">1049</span> +<span id="1050">1050</span> +<span id="1051">1051</span> +<span id="1052">1052</span> +<span id="1053">1053</span> +<span id="1054">1054</span> +<span id="1055">1055</span> +<span id="1056">1056</span> +<span id="1057">1057</span> +<span id="1058">1058</span> +<span id="1059">1059</span> +<span id="1060">1060</span> +<span id="1061">1061</span> +<span id="1062">1062</span> +<span id="1063">1063</span> +<span id="1064">1064</span> +<span id="1065">1065</span> +<span id="1066">1066</span> +<span id="1067">1067</span> +<span id="1068">1068</span> +<span id="1069">1069</span> +<span id="1070">1070</span> +<span id="1071">1071</span> +<span id="1072">1072</span> +<span id="1073">1073</span> +<span id="1074">1074</span> +<span id="1075">1075</span> +<span id="1076">1076</span> +<span id="1077">1077</span> +<span id="1078">1078</span> +<span id="1079">1079</span> +<span id="1080">1080</span> +<span id="1081">1081</span> +<span id="1082">1082</span> +<span id="1083">1083</span> +<span id="1084">1084</span> +<span id="1085">1085</span> +<span id="1086">1086</span> +<span id="1087">1087</span> +<span id="1088">1088</span> +<span id="1089">1089</span> +<span id="1090">1090</span> +<span id="1091">1091</span> +<span id="1092">1092</span> +<span id="1093">1093</span> +<span id="1094">1094</span> +<span id="1095">1095</span> +<span id="1096">1096</span> +<span id="1097">1097</span> +<span id="1098">1098</span> +<span id="1099">1099</span> +<span id="1100">1100</span> +<span id="1101">1101</span> +<span id="1102">1102</span> +<span id="1103">1103</span> +<span id="1104">1104</span> +<span id="1105">1105</span> +<span id="1106">1106</span> +<span id="1107">1107</span> +<span id="1108">1108</span> +<span id="1109">1109</span> +<span id="1110">1110</span> +<span id="1111">1111</span> +<span id="1112">1112</span> +<span id="1113">1113</span> +<span id="1114">1114</span> +<span id="1115">1115</span> +<span id="1116">1116</span> +<span id="1117">1117</span> +<span id="1118">1118</span> +<span id="1119">1119</span> +<span id="1120">1120</span> +<span id="1121">1121</span> +<span id="1122">1122</span> +<span id="1123">1123</span> +<span id="1124">1124</span> +<span id="1125">1125</span> +<span id="1126">1126</span> +<span id="1127">1127</span> +<span id="1128">1128</span> +<span id="1129">1129</span> +<span id="1130">1130</span> +<span id="1131">1131</span> +<span id="1132">1132</span> +<span id="1133">1133</span> +<span id="1134">1134</span> +<span id="1135">1135</span> +<span id="1136">1136</span> +<span id="1137">1137</span> +<span id="1138">1138</span> +<span id="1139">1139</span> +<span id="1140">1140</span> +<span id="1141">1141</span> +<span id="1142">1142</span> +<span id="1143">1143</span> +<span id="1144">1144</span> +<span id="1145">1145</span> +<span id="1146">1146</span> +<span id="1147">1147</span> +<span id="1148">1148</span> +</pre><pre class='rust '> +<span class='comment'>// Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT</span> +<span class='comment'>// file at the top-level directory of this distribution and at</span> +<span class='comment'>// http://rust-lang.org/COPYRIGHT.</span> +<span class='comment'>//</span> +<span class='comment'>// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span> +<span class='comment'>// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span> +<span class='comment'>// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span> +<span class='comment'>// option. This file may not be copied, modified, or distributed</span> +<span class='comment'>// except according to those terms.</span> + +<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>borrow</span>::<span class='ident'>Cow</span>; +<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>collections</span>::<span class='ident'>HashMap</span>; +<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>collections</span>::<span class='ident'>hash_map</span>::<span class='ident'>Iter</span>; +<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>fmt</span>; +<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"pattern"</span>)]</span> +<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>str</span>::<span class='ident'>pattern</span>::{<span class='ident'>Pattern</span>, <span class='ident'>Searcher</span>, <span class='ident'>SearchStep</span>}; +<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>str</span>::<span class='ident'>FromStr</span>; + +<span class='kw'>use</span> <span class='ident'>program</span>::{<span class='ident'>Program</span>, <span class='ident'>MatchEngine</span>}; +<span class='kw'>use</span> <span class='ident'>syntax</span>; + +<span class='kw'>const</span> <span class='ident'>REPLACE_EXPAND</span>: <span class='kw-2'>&</span><span class='lifetime'>'static</span> <span class='ident'>str</span> <span class='op'>=</span> <span class='string'>r"(?x) + (?P<before>^|\b|[^$]) # Ignore `$$name`. + \$ + (?P<name> # Match the actual capture name. Can be... + [0-9]+ # A sequence of digits (for indexed captures), or... + | + [_a-zA-Z][_0-9a-zA-Z]* # A name for named captures. + ) +"</span>; + +<span class='doccomment'>/// Type alias for representing capture indices.</span> +<span class='kw'>pub</span> <span class='kw'>type</span> <span class='ident'>CaptureIdxs</span> <span class='op'>=</span> [<span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>usize</span><span class='op'>></span>]; + +<span class='doccomment'>/// Escapes all regular expression meta characters in `text`.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// The string returned may be safely used as a literal in a regular</span> +<span class='doccomment'>/// expression.</span> +<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>quote</span>(<span class='ident'>text</span>: <span class='kw-2'>&</span><span class='ident'>str</span>) <span class='op'>-></span> <span class='ident'>String</span> { + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>quoted</span> <span class='op'>=</span> <span class='ident'>String</span>::<span class='ident'>with_capacity</span>(<span class='ident'>text</span>.<span class='ident'>len</span>()); + <span class='kw'>for</span> <span class='ident'>c</span> <span class='kw'>in</span> <span class='ident'>text</span>.<span class='ident'>chars</span>() { + <span class='kw'>if</span> <span class='ident'>syntax</span>::<span class='ident'>is_punct</span>(<span class='ident'>c</span>) { + <span class='ident'>quoted</span>.<span class='ident'>push</span>(<span class='string'>'\\'</span>) + } + <span class='ident'>quoted</span>.<span class='ident'>push</span>(<span class='ident'>c</span>); + } + <span class='ident'>quoted</span> +} + +<span class='doccomment'>/// Tests if the given regular expression matches somewhere in the text given.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// If there was a problem compiling the regular expression, an error is</span> +<span class='doccomment'>/// returned.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// To find submatches, split or replace text, you'll need to compile an</span> +<span class='doccomment'>/// expression first.</span> +<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>is_match</span>(<span class='ident'>regex</span>: <span class='kw-2'>&</span><span class='ident'>str</span>, <span class='ident'>text</span>: <span class='kw-2'>&</span><span class='ident'>str</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>bool</span>, <span class='ident'>Error</span><span class='op'>></span> { + <span class='ident'>Regex</span>::<span class='ident'>new</span>(<span class='ident'>regex</span>).<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>r</span><span class='op'>|</span> <span class='ident'>r</span>.<span class='ident'>is_match</span>(<span class='ident'>text</span>)) +} + +<span class='doccomment'>/// An error that occurred during parsing or compiling a regular expression.</span> +<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Debug</span>)]</span> +<span class='kw'>pub</span> <span class='kw'>enum</span> <span class='ident'>Error</span> { + <span class='doccomment'>/// A syntax error.</span> + <span class='ident'>Syntax</span>(<span class='ident'>syntax</span>::<span class='ident'>Error</span>), + <span class='doccomment'>/// The compiled program exceeded the set size limit.</span> + <span class='doccomment'>/// The argument is the size limit imposed.</span> + <span class='ident'>CompiledTooBig</span>(<span class='ident'>usize</span>), + <span class='doccomment'>/// Hints that destructuring should not be exhaustive.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// This enum may grow additional variants, so this makes sure clients</span> + <span class='doccomment'>/// don't count on exhaustive matching. (Otherwise, adding a new variant</span> + <span class='doccomment'>/// could break existing code.)</span> + <span class='attribute'>#[<span class='ident'>doc</span>(<span class='ident'>hidden</span>)]</span> + <span class='ident'>__Nonexhaustive</span>, +} + +<span class='kw'>impl</span> ::<span class='ident'>std</span>::<span class='ident'>error</span>::<span class='ident'>Error</span> <span class='kw'>for</span> <span class='ident'>Error</span> { + <span class='kw'>fn</span> <span class='ident'>description</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='kw-2'>&</span><span class='ident'>str</span> { + <span class='kw'>match</span> <span class='op'>*</span><span class='self'>self</span> { + <span class='ident'>Error</span>::<span class='ident'>Syntax</span>(<span class='kw-2'>ref</span> <span class='ident'>err</span>) <span class='op'>=></span> <span class='ident'>err</span>.<span class='ident'>description</span>(), + <span class='ident'>Error</span>::<span class='ident'>CompiledTooBig</span>(_) <span class='op'>=></span> <span class='string'>"compiled program too big"</span>, + <span class='ident'>Error</span>::<span class='ident'>__Nonexhaustive</span> <span class='op'>=></span> <span class='macro'>unreachable</span><span class='macro'>!</span>(), + } + } + + <span class='kw'>fn</span> <span class='ident'>cause</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='kw-2'>&</span>::<span class='ident'>std</span>::<span class='ident'>error</span>::<span class='ident'>Error</span><span class='op'>></span> { + <span class='kw'>match</span> <span class='op'>*</span><span class='self'>self</span> { + <span class='ident'>Error</span>::<span class='ident'>Syntax</span>(<span class='kw-2'>ref</span> <span class='ident'>err</span>) <span class='op'>=></span> <span class='prelude-val'>Some</span>(<span class='ident'>err</span>), + _ <span class='op'>=></span> <span class='prelude-val'>None</span>, + } + } +} + +<span class='kw'>impl</span> <span class='ident'>fmt</span>::<span class='ident'>Display</span> <span class='kw'>for</span> <span class='ident'>Error</span> { + <span class='kw'>fn</span> <span class='ident'>fmt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>f</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>fmt</span>::<span class='ident'>Formatter</span>) <span class='op'>-></span> <span class='ident'>fmt</span>::<span class='prelude-ty'>Result</span> { + <span class='kw'>match</span> <span class='op'>*</span><span class='self'>self</span> { + <span class='ident'>Error</span>::<span class='ident'>Syntax</span>(<span class='kw-2'>ref</span> <span class='ident'>err</span>) <span class='op'>=></span> <span class='ident'>err</span>.<span class='ident'>fmt</span>(<span class='ident'>f</span>), + <span class='ident'>Error</span>::<span class='ident'>CompiledTooBig</span>(<span class='ident'>limit</span>) <span class='op'>=></span> { + <span class='macro'>write</span><span class='macro'>!</span>(<span class='ident'>f</span>, <span class='string'>"Compiled regex exceeds size limit of {} bytes."</span>, + <span class='ident'>limit</span>) + } + <span class='ident'>Error</span>::<span class='ident'>__Nonexhaustive</span> <span class='op'>=></span> <span class='macro'>unreachable</span><span class='macro'>!</span>(), + } + } +} + +<span class='kw'>impl</span> <span class='ident'>From</span><span class='op'><</span><span class='ident'>syntax</span>::<span class='ident'>Error</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>Error</span> { + <span class='kw'>fn</span> <span class='ident'>from</span>(<span class='ident'>err</span>: <span class='ident'>syntax</span>::<span class='ident'>Error</span>) <span class='op'>-></span> <span class='ident'>Error</span> { + <span class='ident'>Error</span>::<span class='ident'>Syntax</span>(<span class='ident'>err</span>) + } +} + +<span class='doccomment'>/// A compiled regular expression</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// It is represented as either a sequence of bytecode instructions (dynamic)</span> +<span class='doccomment'>/// or as a specialized Rust function (native). It can be used to search, split</span> +<span class='doccomment'>/// or replace text. All searching is done with an implicit `.*?` at the</span> +<span class='doccomment'>/// beginning and end of an expression. To force an expression to match the</span> +<span class='doccomment'>/// whole string (or a prefix or a suffix), you must use an anchor like `^` or</span> +<span class='doccomment'>/// `$` (or `\A` and `\z`).</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// While this crate will handle Unicode strings (whether in the regular</span> +<span class='doccomment'>/// expression or in the search text), all positions returned are **byte</span> +<span class='doccomment'>/// indices**. Every byte index is guaranteed to be at a Unicode code point</span> +<span class='doccomment'>/// boundary.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// The lifetimes `'r` and `'t` in this crate correspond to the lifetime of a</span> +<span class='doccomment'>/// compiled regular expression and text to search, respectively.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// The only methods that allocate new strings are the string replacement</span> +<span class='doccomment'>/// methods. All other methods (searching and splitting) return borrowed</span> +<span class='doccomment'>/// pointers into the string given.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// # Examples</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// Find the location of a US phone number:</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// ```rust</span> +<span class='doccomment'>/// # use regex::Regex;</span> +<span class='doccomment'>/// let re = Regex::new("[0-9]{3}-[0-9]{3}-[0-9]{4}").unwrap();</span> +<span class='doccomment'>/// assert_eq!(re.find("phone: 111-222-3333"), Some((7, 19)));</span> +<span class='doccomment'>/// ```</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// # Using the `std::str::StrExt` methods with `Regex`</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// > **Note**: This section requires that this crate is currently compiled with</span> +<span class='doccomment'>/// > the `pattern` Cargo feature enabled.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// Since `Regex` implements `Pattern`, you can use regexes with methods</span> +<span class='doccomment'>/// defined on `std::str::StrExt`. For example, `is_match`, `find`, `find_iter`</span> +<span class='doccomment'>/// and `split` can be replaced with `StrExt::contains`, `StrExt::find`,</span> +<span class='doccomment'>/// `StrExt::match_indices` and `StrExt::split`.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// Here are some examples:</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// ```rust,ignore</span> +<span class='doccomment'>/// # use regex::Regex;</span> +<span class='doccomment'>/// let re = Regex::new(r"\d+").unwrap();</span> +<span class='doccomment'>/// let haystack = "a111b222c";</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// assert!(haystack.contains(&re));</span> +<span class='doccomment'>/// assert_eq!(haystack.find(&re), Some(1));</span> +<span class='doccomment'>/// assert_eq!(haystack.match_indices(&re).collect::<Vec<_>>(),</span> +<span class='doccomment'>/// vec![(1, 4), (5, 8)]);</span> +<span class='doccomment'>/// assert_eq!(haystack.split(&re).collect::<Vec<_>>(), vec!["a", "b", "c"]);</span> +<span class='doccomment'>/// ```</span> +<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>)]</span> +<span class='kw'>pub</span> <span class='kw'>enum</span> <span class='ident'>Regex</span> { + <span class='comment'>// The representation of `Regex` is exported to support the `regex!`</span> + <span class='comment'>// syntax extension. Do not rely on it.</span> + <span class='comment'>//</span> + <span class='comment'>// See the comments for the `program` module in `lib.rs` for a more</span> + <span class='comment'>// detailed explanation for what `regex!` requires.</span> + <span class='attribute'>#[<span class='ident'>doc</span>(<span class='ident'>hidden</span>)]</span> + <span class='ident'>Dynamic</span>(<span class='ident'>Program</span>), + <span class='attribute'>#[<span class='ident'>doc</span>(<span class='ident'>hidden</span>)]</span> + <span class='ident'>Native</span>(<span class='ident'>ExNative</span>), +} + +<span class='attribute'>#[<span class='ident'>doc</span>(<span class='ident'>hidden</span>)]</span> +<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>ExNative</span> { + <span class='attribute'>#[<span class='ident'>doc</span>(<span class='ident'>hidden</span>)]</span> + <span class='kw'>pub</span> <span class='ident'>original</span>: <span class='kw-2'>&</span><span class='lifetime'>'static</span> <span class='ident'>str</span>, + <span class='attribute'>#[<span class='ident'>doc</span>(<span class='ident'>hidden</span>)]</span> + <span class='kw'>pub</span> <span class='ident'>names</span>: <span class='kw-2'>&</span><span class='lifetime'>'static</span> <span class='kw-2'>&</span><span class='lifetime'>'static</span> [<span class='prelude-ty'>Option</span><span class='op'><</span><span class='kw-2'>&</span><span class='lifetime'>'static</span> <span class='ident'>str</span><span class='op'>></span>], + <span class='attribute'>#[<span class='ident'>doc</span>(<span class='ident'>hidden</span>)]</span> + <span class='kw'>pub</span> <span class='ident'>prog</span>: <span class='kw'>fn</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>CaptureIdxs</span>, <span class='kw-2'>&</span><span class='ident'>str</span>, <span class='ident'>usize</span>) <span class='op'>-></span> <span class='ident'>bool</span>, +} + +<span class='kw'>impl</span> <span class='ident'>Copy</span> <span class='kw'>for</span> <span class='ident'>ExNative</span> {} + +<span class='kw'>impl</span> <span class='ident'>Clone</span> <span class='kw'>for</span> <span class='ident'>ExNative</span> { + <span class='kw'>fn</span> <span class='ident'>clone</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>ExNative</span> { + <span class='op'>*</span><span class='self'>self</span> + } +} + +<span class='kw'>impl</span> <span class='ident'>fmt</span>::<span class='ident'>Display</span> <span class='kw'>for</span> <span class='ident'>Regex</span> { + <span class='doccomment'>/// Shows the original regular expression.</span> + <span class='kw'>fn</span> <span class='ident'>fmt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>f</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>fmt</span>::<span class='ident'>Formatter</span>) <span class='op'>-></span> <span class='ident'>fmt</span>::<span class='prelude-ty'>Result</span> { + <span class='macro'>write</span><span class='macro'>!</span>(<span class='ident'>f</span>, <span class='string'>"{}"</span>, <span class='self'>self</span>.<span class='ident'>as_str</span>()) + } +} + +<span class='kw'>impl</span> <span class='ident'>fmt</span>::<span class='ident'>Debug</span> <span class='kw'>for</span> <span class='ident'>Regex</span> { + <span class='doccomment'>/// Shows the original regular expression.</span> + <span class='kw'>fn</span> <span class='ident'>fmt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>f</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>fmt</span>::<span class='ident'>Formatter</span>) <span class='op'>-></span> <span class='ident'>fmt</span>::<span class='prelude-ty'>Result</span> { + <span class='ident'>fmt</span>::<span class='ident'>Display</span>::<span class='ident'>fmt</span>(<span class='self'>self</span>, <span class='ident'>f</span>) + } +} + +<span class='doccomment'>/// Equality comparison is based on the original string. It is possible that</span> +<span class='doccomment'>/// different regular expressions have the same matching behavior, but are</span> +<span class='doccomment'>/// still compared unequal. For example, `\d+` and `\d\d*` match the same set</span> +<span class='doccomment'>/// of strings, but are not considered equal.</span> +<span class='kw'>impl</span> <span class='ident'>PartialEq</span> <span class='kw'>for</span> <span class='ident'>Regex</span> { + <span class='kw'>fn</span> <span class='ident'>eq</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>other</span>: <span class='kw-2'>&</span><span class='ident'>Regex</span>) <span class='op'>-></span> <span class='ident'>bool</span> { + <span class='self'>self</span>.<span class='ident'>as_str</span>() <span class='op'>==</span> <span class='ident'>other</span>.<span class='ident'>as_str</span>() + } +} + +<span class='kw'>impl</span> <span class='ident'>Eq</span> <span class='kw'>for</span> <span class='ident'>Regex</span> {} + +<span class='kw'>impl</span> <span class='ident'>FromStr</span> <span class='kw'>for</span> <span class='ident'>Regex</span> { + <span class='kw'>type</span> <span class='prelude-val'>Err</span> <span class='op'>=</span> <span class='ident'>Error</span>; + + <span class='doccomment'>/// Attempts to parse a string into a regular expression</span> + <span class='kw'>fn</span> <span class='ident'>from_str</span>(<span class='ident'>s</span>: <span class='kw-2'>&</span><span class='ident'>str</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Regex</span>, <span class='ident'>Error</span><span class='op'>></span> { + <span class='ident'>Regex</span>::<span class='ident'>new</span>(<span class='ident'>s</span>) + } +} + +<span class='kw'>impl</span> <span class='ident'>Regex</span> { + <span class='doccomment'>/// Compiles a dynamic regular expression. Once compiled, it can be</span> + <span class='doccomment'>/// used repeatedly to search, split or replace text in a string.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// If an invalid expression is given, then an error is returned.</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span>(<span class='ident'>re</span>: <span class='kw-2'>&</span><span class='ident'>str</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Regex</span>, <span class='ident'>Error</span><span class='op'>></span> { + <span class='ident'>Regex</span>::<span class='ident'>with_size_limit</span>(<span class='number'>10</span> <span class='op'>*</span> (<span class='number'>1</span> <span class='op'><<</span> <span class='number'>20</span>), <span class='ident'>re</span>) + } + + <span class='doccomment'>/// Compiles a dynamic regular expression with the given size limit.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// The size limit is applied to the size of the *compiled* data structure.</span> + <span class='doccomment'>/// If the data structure exceeds the size given, then an error is</span> + <span class='doccomment'>/// returned.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// The default size limit used in `new` is 10MB.</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>with_size_limit</span>(<span class='ident'>size</span>: <span class='ident'>usize</span>, <span class='ident'>re</span>: <span class='kw-2'>&</span><span class='ident'>str</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Regex</span>, <span class='ident'>Error</span><span class='op'>></span> { + <span class='ident'>Regex</span>::<span class='ident'>with_engine</span>(<span class='prelude-val'>None</span>, <span class='ident'>size</span>, <span class='ident'>re</span>) + } + + <span class='doccomment'>/// Compiles a dynamic regular expression and uses given matching engine.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// This is exposed for use in testing and shouldn't be used by clients.</span> + <span class='doccomment'>/// Instead, the regex program should choose the correct matching engine</span> + <span class='doccomment'>/// to use automatically. (Based on the regex, the size of the input and</span> + <span class='doccomment'>/// the type of search.)</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// A value of `None` means that the engine is automatically selected,</span> + <span class='doccomment'>/// which is the default behavior.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// **WARNING**: Passing an unsuitable engine for the given regex/input</span> + <span class='doccomment'>/// could lead to bad things. (Not unsafe things, but panics, incorrect</span> + <span class='doccomment'>/// matches and large memory use are all things that could happen.)</span> + <span class='attribute'>#[<span class='ident'>doc</span>(<span class='ident'>hidden</span>)]</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>with_engine</span>( + <span class='ident'>engine</span>: <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>MatchEngine</span><span class='op'>></span>, + <span class='ident'>size</span>: <span class='ident'>usize</span>, + <span class='ident'>re</span>: <span class='kw-2'>&</span><span class='ident'>str</span>, + ) <span class='op'>-></span> <span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Regex</span>, <span class='ident'>Error</span><span class='op'>></span> { + <span class='ident'>Program</span>::<span class='ident'>new</span>(<span class='ident'>engine</span>, <span class='ident'>size</span>, <span class='ident'>re</span>).<span class='ident'>map</span>(<span class='ident'>Regex</span>::<span class='ident'>Dynamic</span>) + } + + + <span class='doccomment'>/// Returns true if and only if the regex matches the string given.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// # Example</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// Test if some text contains at least one word with exactly 13</span> + <span class='doccomment'>/// characters:</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// ```rust</span> + <span class='doccomment'>/// # extern crate regex; use regex::Regex;</span> + <span class='doccomment'>/// # fn main() {</span> + <span class='doccomment'>/// let text = "I categorically deny having triskaidekaphobia.";</span> + <span class='doccomment'>/// assert!(Regex::new(r"\b\w{13}\b").unwrap().is_match(text));</span> + <span class='doccomment'>/// # }</span> + <span class='doccomment'>/// ```</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>is_match</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>text</span>: <span class='kw-2'>&</span><span class='ident'>str</span>) <span class='op'>-></span> <span class='ident'>bool</span> { + <span class='ident'>exec</span>(<span class='self'>self</span>, <span class='kw-2'>&</span><span class='kw-2'>mut</span> [], <span class='ident'>text</span>, <span class='number'>0</span>) + } + + <span class='doccomment'>/// Returns the start and end byte range of the leftmost-first match in</span> + <span class='doccomment'>/// `text`. If no match exists, then `None` is returned.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// Note that this should only be used if you want to discover the position</span> + <span class='doccomment'>/// of the match. Testing the existence of a match is faster if you use</span> + <span class='doccomment'>/// `is_match`.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// # Example</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// Find the start and end location of the first word with exactly 13</span> + <span class='doccomment'>/// characters:</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// ```rust</span> + <span class='doccomment'>/// # extern crate regex; use regex::Regex;</span> + <span class='doccomment'>/// # fn main() {</span> + <span class='doccomment'>/// let text = "I categorically deny having triskaidekaphobia.";</span> + <span class='doccomment'>/// let pos = Regex::new(r"\b\w{13}\b").unwrap().find(text);</span> + <span class='doccomment'>/// assert_eq!(pos, Some((2, 15)));</span> + <span class='doccomment'>/// # }</span> + <span class='doccomment'>/// ```</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>find</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>text</span>: <span class='kw-2'>&</span><span class='ident'>str</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span>(<span class='ident'>usize</span>, <span class='ident'>usize</span>)<span class='op'>></span> { + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>caps</span> <span class='op'>=</span> [<span class='prelude-val'>None</span>, <span class='prelude-val'>None</span>]; + <span class='kw'>if</span> <span class='ident'>exec</span>(<span class='self'>self</span>, <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>caps</span>, <span class='ident'>text</span>, <span class='number'>0</span>) { + <span class='prelude-val'>Some</span>((<span class='ident'>caps</span>[<span class='number'>0</span>].<span class='ident'>unwrap</span>(), <span class='ident'>caps</span>[<span class='number'>1</span>].<span class='ident'>unwrap</span>())) + } <span class='kw'>else</span> { + <span class='prelude-val'>None</span> + } + } + + <span class='doccomment'>/// Returns an iterator for each successive non-overlapping match in</span> + <span class='doccomment'>/// `text`, returning the start and end byte indices with respect to</span> + <span class='doccomment'>/// `text`.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// # Example</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// Find the start and end location of every word with exactly 13</span> + <span class='doccomment'>/// characters:</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// ```rust</span> + <span class='doccomment'>/// # extern crate regex; use regex::Regex;</span> + <span class='doccomment'>/// # fn main() {</span> + <span class='doccomment'>/// let text = "Retroactively relinquishing remunerations is reprehensible.";</span> + <span class='doccomment'>/// for pos in Regex::new(r"\b\w{13}\b").unwrap().find_iter(text) {</span> + <span class='doccomment'>/// println!("{:?}", pos);</span> + <span class='doccomment'>/// }</span> + <span class='doccomment'>/// // Output:</span> + <span class='doccomment'>/// // (0, 13)</span> + <span class='doccomment'>/// // (14, 27)</span> + <span class='doccomment'>/// // (28, 41)</span> + <span class='doccomment'>/// // (45, 58)</span> + <span class='doccomment'>/// # }</span> + <span class='doccomment'>/// ```</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>find_iter</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='lifetime'>'r</span> <span class='self'>self</span>, <span class='ident'>text</span>: <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span>) <span class='op'>-></span> <span class='ident'>FindMatches</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> { + <span class='ident'>FindMatches</span> { + <span class='ident'>re</span>: <span class='self'>self</span>, + <span class='ident'>search</span>: <span class='ident'>text</span>, + <span class='ident'>last_end</span>: <span class='number'>0</span>, + <span class='ident'>last_match</span>: <span class='prelude-val'>None</span>, + } + } + + <span class='doccomment'>/// Returns the capture groups corresponding to the leftmost-first</span> + <span class='doccomment'>/// match in `text`. Capture group `0` always corresponds to the entire</span> + <span class='doccomment'>/// match. If no match is found, then `None` is returned.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// You should only use `captures` if you need access to submatches.</span> + <span class='doccomment'>/// Otherwise, `find` is faster for discovering the location of the overall</span> + <span class='doccomment'>/// match.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// # Examples</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// Say you have some text with movie names and their release years,</span> + <span class='doccomment'>/// like "'Citizen Kane' (1941)". It'd be nice if we could search for text</span> + <span class='doccomment'>/// looking like that, while also extracting the movie name and its release</span> + <span class='doccomment'>/// year separately.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// ```rust</span> + <span class='doccomment'>/// # extern crate regex; use regex::Regex;</span> + <span class='doccomment'>/// # fn main() {</span> + <span class='doccomment'>/// let re = Regex::new(r"'([^']+)'\s+\((\d{4})\)").unwrap();</span> + <span class='doccomment'>/// let text = "Not my favorite movie: 'Citizen Kane' (1941).";</span> + <span class='doccomment'>/// let caps = re.captures(text).unwrap();</span> + <span class='doccomment'>/// assert_eq!(caps.at(1), Some("Citizen Kane"));</span> + <span class='doccomment'>/// assert_eq!(caps.at(2), Some("1941"));</span> + <span class='doccomment'>/// assert_eq!(caps.at(0), Some("'Citizen Kane' (1941)"));</span> + <span class='doccomment'>/// # }</span> + <span class='doccomment'>/// ```</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// Note that the full match is at capture group `0`. Each subsequent</span> + <span class='doccomment'>/// capture group is indexed by the order of its opening `(`.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// We can make this example a bit clearer by using *named* capture groups:</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// ```rust</span> + <span class='doccomment'>/// # extern crate regex; use regex::Regex;</span> + <span class='doccomment'>/// # fn main() {</span> + <span class='doccomment'>/// let re = Regex::new(r"'(?P<title>[^']+)'\s+\((?P<year>\d{4})\)")</span> + <span class='doccomment'>/// .unwrap();</span> + <span class='doccomment'>/// let text = "Not my favorite movie: 'Citizen Kane' (1941).";</span> + <span class='doccomment'>/// let caps = re.captures(text).unwrap();</span> + <span class='doccomment'>/// assert_eq!(caps.name("title"), Some("Citizen Kane"));</span> + <span class='doccomment'>/// assert_eq!(caps.name("year"), Some("1941"));</span> + <span class='doccomment'>/// assert_eq!(caps.at(0), Some("'Citizen Kane' (1941)"));</span> + <span class='doccomment'>/// # }</span> + <span class='doccomment'>/// ```</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// Here we name the capture groups, which we can access with the `name`</span> + <span class='doccomment'>/// method. Note that the named capture groups are still accessible with</span> + <span class='doccomment'>/// `at`.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// The `0`th capture group is always unnamed, so it must always be</span> + <span class='doccomment'>/// accessed with `at(0)`.</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>captures</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>text</span>: <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>Captures</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>>></span> { + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>caps</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>alloc_captures</span>(); + <span class='kw'>if</span> <span class='ident'>exec</span>(<span class='self'>self</span>, <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>caps</span>, <span class='ident'>text</span>, <span class='number'>0</span>) { + <span class='prelude-val'>Some</span>(<span class='ident'>Captures</span>::<span class='ident'>new</span>(<span class='self'>self</span>, <span class='ident'>text</span>, <span class='ident'>caps</span>)) + } <span class='kw'>else</span> { + <span class='prelude-val'>None</span> + } + } + + <span class='doccomment'>/// Returns an iterator over all the non-overlapping capture groups matched</span> + <span class='doccomment'>/// in `text`. This is operationally the same as `find_iter` (except it</span> + <span class='doccomment'>/// yields information about submatches).</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// # Example</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// We can use this to find all movie titles and their release years in</span> + <span class='doccomment'>/// some text, where the movie is formatted like "'Title' (xxxx)":</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// ```rust</span> + <span class='doccomment'>/// # extern crate regex; use regex::Regex;</span> + <span class='doccomment'>/// # fn main() {</span> + <span class='doccomment'>/// let re = Regex::new(r"'(?P<title>[^']+)'\s+\((?P<year>\d{4})\)")</span> + <span class='doccomment'>/// .unwrap();</span> + <span class='doccomment'>/// let text = "'Citizen Kane' (1941), 'The Wizard of Oz' (1939), 'M' (1931).";</span> + <span class='doccomment'>/// for caps in re.captures_iter(text) {</span> + <span class='doccomment'>/// println!("Movie: {:?}, Released: {:?}", caps.name("title"), caps.name("year"));</span> + <span class='doccomment'>/// }</span> + <span class='doccomment'>/// // Output:</span> + <span class='doccomment'>/// // Movie: Citizen Kane, Released: 1941</span> + <span class='doccomment'>/// // Movie: The Wizard of Oz, Released: 1939</span> + <span class='doccomment'>/// // Movie: M, Released: 1931</span> + <span class='doccomment'>/// # }</span> + <span class='doccomment'>/// ```</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>captures_iter</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='lifetime'>'r</span> <span class='self'>self</span>, <span class='ident'>text</span>: <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span>) + <span class='op'>-></span> <span class='ident'>FindCaptures</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> { + <span class='ident'>FindCaptures</span> { + <span class='ident'>re</span>: <span class='self'>self</span>, + <span class='ident'>search</span>: <span class='ident'>text</span>, + <span class='ident'>last_match</span>: <span class='prelude-val'>None</span>, + <span class='ident'>last_end</span>: <span class='number'>0</span>, + } + } + + <span class='doccomment'>/// Returns an iterator of substrings of `text` delimited by a match</span> + <span class='doccomment'>/// of the regular expression.</span> + <span class='doccomment'>/// Namely, each element of the iterator corresponds to text that *isn't*</span> + <span class='doccomment'>/// matched by the regular expression.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// This method will *not* copy the text given.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// # Example</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// To split a string delimited by arbitrary amounts of spaces or tabs:</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// ```rust</span> + <span class='doccomment'>/// # extern crate regex; use regex::Regex;</span> + <span class='doccomment'>/// # fn main() {</span> + <span class='doccomment'>/// let re = Regex::new(r"[ \t]+").unwrap();</span> + <span class='doccomment'>/// let fields: Vec<&str> = re.split("a b \t c\td e").collect();</span> + <span class='doccomment'>/// assert_eq!(fields, vec!("a", "b", "c", "d", "e"));</span> + <span class='doccomment'>/// # }</span> + <span class='doccomment'>/// ```</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>split</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='lifetime'>'r</span> <span class='self'>self</span>, <span class='ident'>text</span>: <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span>) <span class='op'>-></span> <span class='ident'>RegexSplits</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> { + <span class='ident'>RegexSplits</span> { + <span class='ident'>finder</span>: <span class='self'>self</span>.<span class='ident'>find_iter</span>(<span class='ident'>text</span>), + <span class='ident'>last</span>: <span class='number'>0</span>, + } + } + + <span class='doccomment'>/// Returns an iterator of at most `limit` substrings of `text` delimited</span> + <span class='doccomment'>/// by a match of the regular expression. (A `limit` of `0` will return no</span> + <span class='doccomment'>/// substrings.)</span> + <span class='doccomment'>/// Namely, each element of the iterator corresponds to text that *isn't*</span> + <span class='doccomment'>/// matched by the regular expression.</span> + <span class='doccomment'>/// The remainder of the string that is not split will be the last element</span> + <span class='doccomment'>/// in the iterator.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// This method will *not* copy the text given.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// # Example</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// Get the first two words in some text:</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// ```rust</span> + <span class='doccomment'>/// # extern crate regex; use regex::Regex;</span> + <span class='doccomment'>/// # fn main() {</span> + <span class='doccomment'>/// let re = Regex::new(r"\W+").unwrap();</span> + <span class='doccomment'>/// let fields: Vec<&str> = re.splitn("Hey! How are you?", 3).collect();</span> + <span class='doccomment'>/// assert_eq!(fields, vec!("Hey", "How", "are you?"));</span> + <span class='doccomment'>/// # }</span> + <span class='doccomment'>/// ```</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>splitn</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='lifetime'>'r</span> <span class='self'>self</span>, <span class='ident'>text</span>: <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span>, <span class='ident'>limit</span>: <span class='ident'>usize</span>) + <span class='op'>-></span> <span class='ident'>RegexSplitsN</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> { + <span class='ident'>RegexSplitsN</span> { + <span class='ident'>splits</span>: <span class='self'>self</span>.<span class='ident'>split</span>(<span class='ident'>text</span>), + <span class='ident'>cur</span>: <span class='number'>0</span>, + <span class='ident'>limit</span>: <span class='ident'>limit</span>, + } + } + + <span class='doccomment'>/// Replaces the leftmost-first match with the replacement provided.</span> + <span class='doccomment'>/// The replacement can be a regular string (where `$N` and `$name` are</span> + <span class='doccomment'>/// expanded to match capture groups) or a function that takes the matches'</span> + <span class='doccomment'>/// `Captures` and returns the replaced string.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// If no match is found, then a copy of the string is returned unchanged.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// # Examples</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// Note that this function is polymorphic with respect to the replacement.</span> + <span class='doccomment'>/// In typical usage, this can just be a normal string:</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// ```rust</span> + <span class='doccomment'>/// # extern crate regex; use regex::Regex;</span> + <span class='doccomment'>/// # fn main() {</span> + <span class='doccomment'>/// let re = Regex::new("[^01]+").unwrap();</span> + <span class='doccomment'>/// assert_eq!(re.replace("1078910", ""), "1010");</span> + <span class='doccomment'>/// # }</span> + <span class='doccomment'>/// ```</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// But anything satisfying the `Replacer` trait will work. For example,</span> + <span class='doccomment'>/// a closure of type `|&Captures| -> String` provides direct access to the</span> + <span class='doccomment'>/// captures corresponding to a match. This allows one to access</span> + <span class='doccomment'>/// submatches easily:</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// ```rust</span> + <span class='doccomment'>/// # extern crate regex; use regex::Regex;</span> + <span class='doccomment'>/// # use regex::Captures; fn main() {</span> + <span class='doccomment'>/// let re = Regex::new(r"([^,\s]+),\s+(\S+)").unwrap();</span> + <span class='doccomment'>/// let result = re.replace("Springsteen, Bruce", |caps: &Captures| {</span> + <span class='doccomment'>/// format!("{} {}", caps.at(2).unwrap_or(""), caps.at(1).unwrap_or(""))</span> + <span class='doccomment'>/// });</span> + <span class='doccomment'>/// assert_eq!(result, "Bruce Springsteen");</span> + <span class='doccomment'>/// # }</span> + <span class='doccomment'>/// ```</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// But this is a bit cumbersome to use all the time. Instead, a simple</span> + <span class='doccomment'>/// syntax is supported that expands `$name` into the corresponding capture</span> + <span class='doccomment'>/// group. Here's the last example, but using this expansion technique</span> + <span class='doccomment'>/// with named capture groups:</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// ```rust</span> + <span class='doccomment'>/// # extern crate regex; use regex::Regex;</span> + <span class='doccomment'>/// # fn main() {</span> + <span class='doccomment'>/// let re = Regex::new(r"(?P<last>[^,\s]+),\s+(?P<first>\S+)").unwrap();</span> + <span class='doccomment'>/// let result = re.replace("Springsteen, Bruce", "$first $last");</span> + <span class='doccomment'>/// assert_eq!(result, "Bruce Springsteen");</span> + <span class='doccomment'>/// # }</span> + <span class='doccomment'>/// ```</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// Note that using `$2` instead of `$first` or `$1` instead of `$last`</span> + <span class='doccomment'>/// would produce the same result. To write a literal `$` use `$$`.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// Finally, sometimes you just want to replace a literal string with no</span> + <span class='doccomment'>/// submatch expansion. This can be done by wrapping a string with</span> + <span class='doccomment'>/// `NoExpand`:</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// ```rust</span> + <span class='doccomment'>/// # extern crate regex; use regex::Regex;</span> + <span class='doccomment'>/// # fn main() {</span> + <span class='doccomment'>/// use regex::NoExpand;</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// let re = Regex::new(r"(?P<last>[^,\s]+),\s+(\S+)").unwrap();</span> + <span class='doccomment'>/// let result = re.replace("Springsteen, Bruce", NoExpand("$2 $last"));</span> + <span class='doccomment'>/// assert_eq!(result, "$2 $last");</span> + <span class='doccomment'>/// # }</span> + <span class='doccomment'>/// ```</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>replace</span><span class='op'><</span><span class='ident'>R</span>: <span class='ident'>Replacer</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>text</span>: <span class='kw-2'>&</span><span class='ident'>str</span>, <span class='ident'>rep</span>: <span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>String</span> { + <span class='self'>self</span>.<span class='ident'>replacen</span>(<span class='ident'>text</span>, <span class='number'>1</span>, <span class='ident'>rep</span>) + } + + <span class='doccomment'>/// Replaces all non-overlapping matches in `text` with the</span> + <span class='doccomment'>/// replacement provided. This is the same as calling `replacen` with</span> + <span class='doccomment'>/// `limit` set to `0`.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// See the documentation for `replace` for details on how to access</span> + <span class='doccomment'>/// submatches in the replacement string.</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>replace_all</span><span class='op'><</span><span class='ident'>R</span>: <span class='ident'>Replacer</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>text</span>: <span class='kw-2'>&</span><span class='ident'>str</span>, <span class='ident'>rep</span>: <span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>String</span> { + <span class='self'>self</span>.<span class='ident'>replacen</span>(<span class='ident'>text</span>, <span class='number'>0</span>, <span class='ident'>rep</span>) + } + + <span class='doccomment'>/// Replaces at most `limit` non-overlapping matches in `text` with the</span> + <span class='doccomment'>/// replacement provided. If `limit` is 0, then all non-overlapping matches</span> + <span class='doccomment'>/// are replaced.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// See the documentation for `replace` for details on how to access</span> + <span class='doccomment'>/// submatches in the replacement string.</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>replacen</span><span class='op'><</span><span class='ident'>R</span>: <span class='ident'>Replacer</span><span class='op'>></span> + (<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>text</span>: <span class='kw-2'>&</span><span class='ident'>str</span>, <span class='ident'>limit</span>: <span class='ident'>usize</span>, <span class='kw-2'>mut</span> <span class='ident'>rep</span>: <span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>String</span> { + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>new</span> <span class='op'>=</span> <span class='ident'>String</span>::<span class='ident'>with_capacity</span>(<span class='ident'>text</span>.<span class='ident'>len</span>()); + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>last_match</span> <span class='op'>=</span> <span class='number'>0</span>; + + <span class='kw'>if</span> <span class='ident'>rep</span>.<span class='ident'>no_expand</span>().<span class='ident'>is_some</span>() { + <span class='comment'>// borrow checker pains. `rep` is borrowed mutably in the `else`</span> + <span class='comment'>// branch below.</span> + <span class='kw'>let</span> <span class='ident'>rep</span> <span class='op'>=</span> <span class='ident'>rep</span>.<span class='ident'>no_expand</span>().<span class='ident'>unwrap</span>(); + <span class='kw'>for</span> (<span class='ident'>i</span>, (<span class='ident'>s</span>, <span class='ident'>e</span>)) <span class='kw'>in</span> <span class='self'>self</span>.<span class='ident'>find_iter</span>(<span class='ident'>text</span>).<span class='ident'>enumerate</span>() { + <span class='kw'>if</span> <span class='ident'>limit</span> <span class='op'>></span> <span class='number'>0</span> <span class='op'>&&</span> <span class='ident'>i</span> <span class='op'>>=</span> <span class='ident'>limit</span> { + <span class='kw'>break</span> + } + <span class='ident'>new</span>.<span class='ident'>push_str</span>(<span class='kw-2'>&</span><span class='ident'>text</span>[<span class='ident'>last_match</span>..<span class='ident'>s</span>]); + <span class='ident'>new</span>.<span class='ident'>push_str</span>(<span class='kw-2'>&</span><span class='ident'>rep</span>); + <span class='ident'>last_match</span> <span class='op'>=</span> <span class='ident'>e</span>; + } + } <span class='kw'>else</span> { + <span class='kw'>for</span> (<span class='ident'>i</span>, <span class='ident'>cap</span>) <span class='kw'>in</span> <span class='self'>self</span>.<span class='ident'>captures_iter</span>(<span class='ident'>text</span>).<span class='ident'>enumerate</span>() { + <span class='kw'>if</span> <span class='ident'>limit</span> <span class='op'>></span> <span class='number'>0</span> <span class='op'>&&</span> <span class='ident'>i</span> <span class='op'>>=</span> <span class='ident'>limit</span> { + <span class='kw'>break</span> + } + <span class='comment'>// unwrap on 0 is OK because captures only reports matches</span> + <span class='kw'>let</span> (<span class='ident'>s</span>, <span class='ident'>e</span>) <span class='op'>=</span> <span class='ident'>cap</span>.<span class='ident'>pos</span>(<span class='number'>0</span>).<span class='ident'>unwrap</span>(); + <span class='ident'>new</span>.<span class='ident'>push_str</span>(<span class='kw-2'>&</span><span class='ident'>text</span>[<span class='ident'>last_match</span>..<span class='ident'>s</span>]); + <span class='ident'>new</span>.<span class='ident'>push_str</span>(<span class='kw-2'>&</span><span class='ident'>rep</span>.<span class='ident'>reg_replace</span>(<span class='kw-2'>&</span><span class='ident'>cap</span>)); + <span class='ident'>last_match</span> <span class='op'>=</span> <span class='ident'>e</span>; + } + } + <span class='ident'>new</span>.<span class='ident'>push_str</span>(<span class='kw-2'>&</span><span class='ident'>text</span>[<span class='ident'>last_match</span>..]); + <span class='ident'>new</span> + } + + <span class='doccomment'>/// Returns the original string of this regex.</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>as_str</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='ident'>str</span> { + <span class='kw'>match</span> <span class='op'>*</span><span class='self'>self</span> { + <span class='ident'>Regex</span>::<span class='ident'>Dynamic</span>(<span class='ident'>Program</span> { <span class='kw-2'>ref</span> <span class='ident'>original</span>, .. }) <span class='op'>=></span> <span class='ident'>original</span>, + <span class='ident'>Regex</span>::<span class='ident'>Native</span>(<span class='ident'>ExNative</span> { <span class='kw-2'>ref</span> <span class='ident'>original</span>, .. }) <span class='op'>=></span> <span class='ident'>original</span>, + } + } + + <span class='attribute'>#[<span class='ident'>doc</span>(<span class='ident'>hidden</span>)]</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>names_iter</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>NamesIter</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span> { + <span class='kw'>match</span> <span class='op'>*</span><span class='self'>self</span> { + <span class='ident'>Regex</span>::<span class='ident'>Native</span>(<span class='kw-2'>ref</span> <span class='ident'>n</span>) <span class='op'>=></span> <span class='ident'>NamesIter</span>::<span class='ident'>Native</span>(<span class='ident'>n</span>.<span class='ident'>names</span>.<span class='ident'>iter</span>()), + <span class='ident'>Regex</span>::<span class='ident'>Dynamic</span>(<span class='kw-2'>ref</span> <span class='ident'>d</span>) <span class='op'>=></span> <span class='ident'>NamesIter</span>::<span class='ident'>Dynamic</span>(<span class='ident'>d</span>.<span class='ident'>cap_names</span>.<span class='ident'>iter</span>()) + } + } + + <span class='kw'>fn</span> <span class='ident'>names_len</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>usize</span> { + <span class='kw'>match</span> <span class='op'>*</span><span class='self'>self</span> { + <span class='ident'>Regex</span>::<span class='ident'>Native</span>(<span class='kw-2'>ref</span> <span class='ident'>n</span>) <span class='op'>=></span> <span class='ident'>n</span>.<span class='ident'>names</span>.<span class='ident'>len</span>(), + <span class='ident'>Regex</span>::<span class='ident'>Dynamic</span>(<span class='kw-2'>ref</span> <span class='ident'>d</span>) <span class='op'>=></span> <span class='ident'>d</span>.<span class='ident'>cap_names</span>.<span class='ident'>len</span>() + } + } + + <span class='kw'>fn</span> <span class='ident'>alloc_captures</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>Vec</span><span class='op'><</span><span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>usize</span><span class='op'>>></span> { + <span class='kw'>match</span> <span class='op'>*</span><span class='self'>self</span> { + <span class='ident'>Regex</span>::<span class='ident'>Native</span>(<span class='kw-2'>ref</span> <span class='ident'>n</span>) <span class='op'>=></span> <span class='macro'>vec</span><span class='macro'>!</span>[<span class='prelude-val'>None</span>; <span class='number'>2</span> <span class='op'>*</span> <span class='ident'>n</span>.<span class='ident'>names</span>.<span class='ident'>len</span>()], + <span class='ident'>Regex</span>::<span class='ident'>Dynamic</span>(<span class='kw-2'>ref</span> <span class='ident'>d</span>) <span class='op'>=></span> <span class='ident'>d</span>.<span class='ident'>alloc_captures</span>(), + } + } +} + +<span class='kw'>pub</span> <span class='kw'>enum</span> <span class='ident'>NamesIter</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span> { + <span class='ident'>Native</span>(::<span class='ident'>std</span>::<span class='ident'>slice</span>::<span class='ident'>Iter</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='prelude-ty'>Option</span><span class='op'><</span><span class='kw-2'>&</span><span class='lifetime'>'static</span> <span class='ident'>str</span><span class='op'>>></span>), + <span class='ident'>Dynamic</span>(::<span class='ident'>std</span>::<span class='ident'>slice</span>::<span class='ident'>Iter</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>String</span><span class='op'>>></span>) +} + +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span> <span class='ident'>Iterator</span> <span class='kw'>for</span> <span class='ident'>NamesIter</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span> { + <span class='kw'>type</span> <span class='ident'>Item</span><span class='op'>=</span><span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>String</span><span class='op'>></span>; + + <span class='kw'>fn</span> <span class='ident'>next</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>String</span><span class='op'>>></span> { + <span class='kw'>match</span> <span class='op'>*</span><span class='self'>self</span> { + <span class='ident'>NamesIter</span>::<span class='ident'>Native</span>(<span class='kw-2'>ref</span> <span class='kw-2'>mut</span> <span class='ident'>i</span>) <span class='op'>=></span> + <span class='ident'>i</span>.<span class='ident'>next</span>().<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>x</span><span class='op'>|</span> <span class='ident'>x</span>.<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>s</span><span class='op'>|</span> <span class='ident'>s</span>.<span class='ident'>to_owned</span>())), + <span class='ident'>NamesIter</span>::<span class='ident'>Dynamic</span>(<span class='kw-2'>ref</span> <span class='kw-2'>mut</span> <span class='ident'>i</span>) <span class='op'>=></span> + <span class='ident'>i</span>.<span class='ident'>next</span>().<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>x</span><span class='op'>|</span> <span class='ident'>x</span>.<span class='ident'>as_ref</span>().<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>s</span><span class='op'>|</span> <span class='ident'>s</span>.<span class='ident'>to_owned</span>())), + } + } +} + +<span class='doccomment'>/// NoExpand indicates literal string replacement.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// It can be used with `replace` and `replace_all` to do a literal</span> +<span class='doccomment'>/// string replacement without expanding `$name` to their corresponding</span> +<span class='doccomment'>/// capture groups.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// `'r` is the lifetime of the literal text.</span> +<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>NoExpand</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span>(<span class='kw'>pub</span> <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span>); + +<span class='doccomment'>/// Replacer describes types that can be used to replace matches in a string.</span> +<span class='kw'>pub</span> <span class='kw'>trait</span> <span class='ident'>Replacer</span> { + <span class='doccomment'>/// Returns a possibly owned string that is used to replace the match</span> + <span class='doccomment'>/// corresponding to the `caps` capture group.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// The `'a` lifetime refers to the lifetime of a borrowed string when</span> + <span class='doccomment'>/// a new owned string isn't needed (e.g., for `NoExpand`).</span> + <span class='kw'>fn</span> <span class='ident'>reg_replace</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>caps</span>: <span class='kw-2'>&</span><span class='ident'>Captures</span>) <span class='op'>-></span> <span class='ident'>Cow</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>str</span><span class='op'>></span>; + + <span class='doccomment'>/// Returns a possibly owned string that never needs expansion.</span> + <span class='kw'>fn</span> <span class='ident'>no_expand</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>Cow</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>str</span><span class='op'>>></span> { <span class='prelude-val'>None</span> } +} + +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> <span class='ident'>Replacer</span> <span class='kw'>for</span> <span class='ident'>NoExpand</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> { + <span class='kw'>fn</span> <span class='ident'>reg_replace</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='kw-2'>mut</span> <span class='self'>self</span>, _: <span class='kw-2'>&</span><span class='ident'>Captures</span>) <span class='op'>-></span> <span class='ident'>Cow</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>str</span><span class='op'>></span> { + <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>into</span>() + } + + <span class='kw'>fn</span> <span class='ident'>no_expand</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>Cow</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>str</span><span class='op'>>></span> { + <span class='prelude-val'>Some</span>(<span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>into</span>()) + } +} + +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> <span class='ident'>Replacer</span> <span class='kw'>for</span> <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span> { + <span class='kw'>fn</span> <span class='ident'>reg_replace</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>caps</span>: <span class='kw-2'>&</span><span class='ident'>Captures</span>) <span class='op'>-></span> <span class='ident'>Cow</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>str</span><span class='op'>></span> { + <span class='ident'>caps</span>.<span class='ident'>expand</span>(<span class='op'>*</span><span class='self'>self</span>).<span class='ident'>into</span>() + } + + <span class='kw'>fn</span> <span class='ident'>no_expand</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>Cow</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>str</span><span class='op'>>></span> { + <span class='kw'>let</span> <span class='ident'>re</span> <span class='op'>=</span> <span class='ident'>Regex</span>::<span class='ident'>new</span>(<span class='ident'>REPLACE_EXPAND</span>).<span class='ident'>unwrap</span>(); + <span class='kw'>if</span> <span class='op'>!</span><span class='ident'>re</span>.<span class='ident'>is_match</span>(<span class='self'>self</span>) { + <span class='prelude-val'>Some</span>((<span class='op'>*</span><span class='self'>self</span>).<span class='ident'>into</span>()) + } <span class='kw'>else</span> { + <span class='prelude-val'>None</span> + } + } +} + +<span class='kw'>impl</span><span class='op'><</span><span class='ident'>F</span><span class='op'>></span> <span class='ident'>Replacer</span> <span class='kw'>for</span> <span class='ident'>F</span> <span class='kw'>where</span> <span class='ident'>F</span>: <span class='ident'>FnMut</span>(<span class='kw-2'>&</span><span class='ident'>Captures</span>) <span class='op'>-></span> <span class='ident'>String</span> { + <span class='kw'>fn</span> <span class='ident'>reg_replace</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>caps</span>: <span class='kw-2'>&</span><span class='ident'>Captures</span>) <span class='op'>-></span> <span class='ident'>Cow</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>str</span><span class='op'>></span> { + (<span class='op'>*</span><span class='self'>self</span>)(<span class='ident'>caps</span>).<span class='ident'>into</span>() + } +} + +<span class='doccomment'>/// Yields all substrings delimited by a regular expression match.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// `'r` is the lifetime of the compiled expression and `'t` is the lifetime</span> +<span class='doccomment'>/// of the string being split.</span> +<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>RegexSplits</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> { + <span class='ident'>finder</span>: <span class='ident'>FindMatches</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span>, + <span class='ident'>last</span>: <span class='ident'>usize</span>, +} + +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> <span class='ident'>Iterator</span> <span class='kw'>for</span> <span class='ident'>RegexSplits</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> { + <span class='kw'>type</span> <span class='ident'>Item</span> <span class='op'>=</span> <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span>; + + <span class='kw'>fn</span> <span class='ident'>next</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span><span class='op'>></span> { + <span class='kw'>let</span> <span class='ident'>text</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>finder</span>.<span class='ident'>search</span>; + <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>finder</span>.<span class='ident'>next</span>() { + <span class='prelude-val'>None</span> <span class='op'>=></span> { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>last</span> <span class='op'>>=</span> <span class='ident'>text</span>.<span class='ident'>len</span>() { + <span class='prelude-val'>None</span> + } <span class='kw'>else</span> { + <span class='kw'>let</span> <span class='ident'>s</span> <span class='op'>=</span> <span class='kw-2'>&</span><span class='ident'>text</span>[<span class='self'>self</span>.<span class='ident'>last</span>..]; + <span class='self'>self</span>.<span class='ident'>last</span> <span class='op'>=</span> <span class='ident'>text</span>.<span class='ident'>len</span>(); + <span class='prelude-val'>Some</span>(<span class='ident'>s</span>) + } + } + <span class='prelude-val'>Some</span>((<span class='ident'>s</span>, <span class='ident'>e</span>)) <span class='op'>=></span> { + <span class='kw'>let</span> <span class='ident'>matched</span> <span class='op'>=</span> <span class='kw-2'>&</span><span class='ident'>text</span>[<span class='self'>self</span>.<span class='ident'>last</span>..<span class='ident'>s</span>]; + <span class='self'>self</span>.<span class='ident'>last</span> <span class='op'>=</span> <span class='ident'>e</span>; + <span class='prelude-val'>Some</span>(<span class='ident'>matched</span>) + } + } + } +} + +<span class='doccomment'>/// Yields at most `N` substrings delimited by a regular expression match.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// The last substring will be whatever remains after splitting.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// `'r` is the lifetime of the compiled expression and `'t` is the lifetime</span> +<span class='doccomment'>/// of the string being split.</span> +<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>RegexSplitsN</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> { + <span class='ident'>splits</span>: <span class='ident'>RegexSplits</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span>, + <span class='ident'>cur</span>: <span class='ident'>usize</span>, + <span class='ident'>limit</span>: <span class='ident'>usize</span>, +} + +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> <span class='ident'>Iterator</span> <span class='kw'>for</span> <span class='ident'>RegexSplitsN</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> { + <span class='kw'>type</span> <span class='ident'>Item</span> <span class='op'>=</span> <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span>; + + <span class='kw'>fn</span> <span class='ident'>next</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span><span class='op'>></span> { + <span class='kw'>let</span> <span class='ident'>text</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>splits</span>.<span class='ident'>finder</span>.<span class='ident'>search</span>; + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>cur</span> <span class='op'>>=</span> <span class='self'>self</span>.<span class='ident'>limit</span> { + <span class='prelude-val'>None</span> + } <span class='kw'>else</span> { + <span class='self'>self</span>.<span class='ident'>cur</span> <span class='op'>+=</span> <span class='number'>1</span>; + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>cur</span> <span class='op'>>=</span> <span class='self'>self</span>.<span class='ident'>limit</span> { + <span class='prelude-val'>Some</span>(<span class='kw-2'>&</span><span class='ident'>text</span>[<span class='self'>self</span>.<span class='ident'>splits</span>.<span class='ident'>last</span>..]) + } <span class='kw'>else</span> { + <span class='self'>self</span>.<span class='ident'>splits</span>.<span class='ident'>next</span>() + } + } + } +} + +<span class='doccomment'>/// Captures represents a group of captured strings for a single match.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// The 0th capture always corresponds to the entire match. Each subsequent</span> +<span class='doccomment'>/// index corresponds to the next capture group in the regex.</span> +<span class='doccomment'>/// If a capture group is named, then the matched string is *also* available</span> +<span class='doccomment'>/// via the `name` method. (Note that the 0th capture is always unnamed and so</span> +<span class='doccomment'>/// must be accessed with the `at` method.)</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// Positions returned from a capture group are always byte indices.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// `'t` is the lifetime of the matched text.</span> +<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>Captures</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> { + <span class='ident'>text</span>: <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span>, + <span class='ident'>locs</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>usize</span><span class='op'>>></span>, + <span class='ident'>named</span>: <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>HashMap</span><span class='op'><</span><span class='ident'>String</span>, <span class='ident'>usize</span><span class='op'>>></span>, +} + +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> <span class='ident'>Captures</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> { + <span class='kw'>fn</span> <span class='ident'>new</span>( + <span class='ident'>re</span>: <span class='kw-2'>&</span><span class='ident'>Regex</span>, + <span class='ident'>search</span>: <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span>, + <span class='ident'>locs</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>usize</span><span class='op'>>></span>, + ) <span class='op'>-></span> <span class='ident'>Captures</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> { + <span class='kw'>let</span> <span class='ident'>named</span> <span class='op'>=</span> + <span class='kw'>if</span> <span class='ident'>re</span>.<span class='ident'>names_len</span>() <span class='op'>==</span> <span class='number'>0</span> { + <span class='prelude-val'>None</span> + } <span class='kw'>else</span> { + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>named</span> <span class='op'>=</span> <span class='ident'>HashMap</span>::<span class='ident'>new</span>(); + <span class='kw'>for</span> (<span class='ident'>i</span>, <span class='ident'>name</span>) <span class='kw'>in</span> <span class='ident'>re</span>.<span class='ident'>names_iter</span>().<span class='ident'>enumerate</span>() { + <span class='kw'>if</span> <span class='kw'>let</span> <span class='prelude-val'>Some</span>(<span class='ident'>name</span>) <span class='op'>=</span> <span class='ident'>name</span> { + <span class='ident'>named</span>.<span class='ident'>insert</span>(<span class='ident'>name</span>, <span class='ident'>i</span>); + } + } + <span class='prelude-val'>Some</span>(<span class='ident'>named</span>) + }; + <span class='ident'>Captures</span> { + <span class='ident'>text</span>: <span class='ident'>search</span>, + <span class='ident'>locs</span>: <span class='ident'>locs</span>, + <span class='ident'>named</span>: <span class='ident'>named</span>, + } + } + + <span class='doccomment'>/// Returns the start and end positions of the Nth capture group.</span> + <span class='doccomment'>/// Returns `None` if `i` is not a valid capture group or if the capture</span> + <span class='doccomment'>/// group did not match anything.</span> + <span class='doccomment'>/// The positions returned are *always* byte indices with respect to the</span> + <span class='doccomment'>/// original string matched.</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>pos</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>i</span>: <span class='ident'>usize</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span>(<span class='ident'>usize</span>, <span class='ident'>usize</span>)<span class='op'>></span> { + <span class='kw'>let</span> (<span class='ident'>s</span>, <span class='ident'>e</span>) <span class='op'>=</span> (<span class='ident'>i</span> <span class='op'>*</span> <span class='number'>2</span>, <span class='ident'>i</span> <span class='op'>*</span> <span class='number'>2</span> <span class='op'>+</span> <span class='number'>1</span>); + <span class='kw'>if</span> <span class='ident'>e</span> <span class='op'>>=</span> <span class='self'>self</span>.<span class='ident'>locs</span>.<span class='ident'>len</span>() <span class='op'>||</span> <span class='self'>self</span>.<span class='ident'>locs</span>[<span class='ident'>s</span>].<span class='ident'>is_none</span>() { + <span class='comment'>// VM guarantees that each pair of locations are both Some or None.</span> + <span class='kw'>return</span> <span class='prelude-val'>None</span> + } + <span class='prelude-val'>Some</span>((<span class='self'>self</span>.<span class='ident'>locs</span>[<span class='ident'>s</span>].<span class='ident'>unwrap</span>(), <span class='self'>self</span>.<span class='ident'>locs</span>[<span class='ident'>e</span>].<span class='ident'>unwrap</span>())) + } + + <span class='doccomment'>/// Returns the matched string for the capture group `i`. If `i` isn't</span> + <span class='doccomment'>/// a valid capture group or didn't match anything, then `None` is</span> + <span class='doccomment'>/// returned.</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>at</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>i</span>: <span class='ident'>usize</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span><span class='op'>></span> { + <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>pos</span>(<span class='ident'>i</span>) { + <span class='prelude-val'>None</span> <span class='op'>=></span> <span class='prelude-val'>None</span>, + <span class='prelude-val'>Some</span>((<span class='ident'>s</span>, <span class='ident'>e</span>)) <span class='op'>=></span> <span class='prelude-val'>Some</span>(<span class='kw-2'>&</span><span class='self'>self</span>.<span class='ident'>text</span>[<span class='ident'>s</span>..<span class='ident'>e</span>]) + } + } + + <span class='doccomment'>/// Returns the matched string for the capture group named `name`. If</span> + <span class='doccomment'>/// `name` isn't a valid capture group or didn't match anything, then</span> + <span class='doccomment'>/// `None` is returned.</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>name</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>name</span>: <span class='kw-2'>&</span><span class='ident'>str</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span><span class='op'>></span> { + <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>named</span> { + <span class='prelude-val'>None</span> <span class='op'>=></span> <span class='prelude-val'>None</span>, + <span class='prelude-val'>Some</span>(<span class='kw-2'>ref</span> <span class='ident'>h</span>) <span class='op'>=></span> { + <span class='kw'>match</span> <span class='ident'>h</span>.<span class='ident'>get</span>(<span class='ident'>name</span>) { + <span class='prelude-val'>None</span> <span class='op'>=></span> <span class='prelude-val'>None</span>, + <span class='prelude-val'>Some</span>(<span class='ident'>i</span>) <span class='op'>=></span> <span class='self'>self</span>.<span class='ident'>at</span>(<span class='op'>*</span><span class='ident'>i</span>), + } + } + } + } + + <span class='doccomment'>/// Creates an iterator of all the capture groups in order of appearance</span> + <span class='doccomment'>/// in the regular expression.</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>iter</span>(<span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>SubCaptures</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> { + <span class='ident'>SubCaptures</span> { <span class='ident'>idx</span>: <span class='number'>0</span>, <span class='ident'>caps</span>: <span class='self'>self</span>, } + } + + <span class='doccomment'>/// Creates an iterator of all the capture group positions in order of</span> + <span class='doccomment'>/// appearance in the regular expression. Positions are byte indices</span> + <span class='doccomment'>/// in terms of the original string matched.</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>iter_pos</span>(<span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>SubCapturesPos</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> { + <span class='ident'>SubCapturesPos</span> { <span class='ident'>idx</span>: <span class='number'>0</span>, <span class='ident'>caps</span>: <span class='self'>self</span>, } + } + + <span class='doccomment'>/// Creates an iterator of all named groups as an tuple with the group</span> + <span class='doccomment'>/// name and the value. The iterator returns these values in arbitrary</span> + <span class='doccomment'>/// order.</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>iter_named</span>(<span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>SubCapturesNamed</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> { + <span class='ident'>SubCapturesNamed</span> { <span class='ident'>caps</span>: <span class='self'>self</span>, <span class='ident'>inner</span>: <span class='self'>self</span>.<span class='ident'>named</span>.<span class='ident'>as_ref</span>().<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>n</span><span class='op'>|</span> <span class='ident'>n</span>.<span class='ident'>iter</span>()) } + } + + <span class='doccomment'>/// Expands all instances of `$name` in `text` to the corresponding capture</span> + <span class='doccomment'>/// group `name`.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// `name` may be an integer corresponding to the index of the</span> + <span class='doccomment'>/// capture group (counted by order of opening parenthesis where `0` is the</span> + <span class='doccomment'>/// entire match) or it can be a name (consisting of letters, digits or</span> + <span class='doccomment'>/// underscores) corresponding to a named capture group.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// If `name` isn't a valid capture group (whether the name doesn't exist or</span> + <span class='doccomment'>/// isn't a valid index), then it is replaced with the empty string.</span> + <span class='doccomment'>///</span> + <span class='doccomment'>/// To write a literal `$` use `$$`.</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>expand</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>text</span>: <span class='kw-2'>&</span><span class='ident'>str</span>) <span class='op'>-></span> <span class='ident'>String</span> { + <span class='comment'>// How evil can you get?</span> + <span class='kw'>let</span> <span class='ident'>re</span> <span class='op'>=</span> <span class='ident'>Regex</span>::<span class='ident'>new</span>(<span class='ident'>REPLACE_EXPAND</span>).<span class='ident'>unwrap</span>(); + <span class='kw'>let</span> <span class='ident'>text</span> <span class='op'>=</span> <span class='ident'>re</span>.<span class='ident'>replace_all</span>(<span class='ident'>text</span>, <span class='op'>|</span><span class='ident'>refs</span>: <span class='kw-2'>&</span><span class='ident'>Captures</span><span class='op'>|</span> <span class='op'>-></span> <span class='ident'>String</span> { + <span class='kw'>let</span> <span class='ident'>before</span> <span class='op'>=</span> <span class='ident'>refs</span>.<span class='ident'>name</span>(<span class='string'>"before"</span>).<span class='ident'>unwrap_or</span>(<span class='string'>""</span>); + <span class='kw'>let</span> <span class='ident'>name</span> <span class='op'>=</span> <span class='ident'>refs</span>.<span class='ident'>name</span>(<span class='string'>"name"</span>).<span class='ident'>unwrap_or</span>(<span class='string'>""</span>); + <span class='macro'>format</span><span class='macro'>!</span>(<span class='string'>"{}{}"</span>, <span class='ident'>before</span>, <span class='kw'>match</span> <span class='ident'>name</span>.<span class='ident'>parse</span>::<span class='op'><</span><span class='ident'>usize</span><span class='op'>></span>() { + <span class='prelude-val'>Err</span>(_) <span class='op'>=></span> <span class='self'>self</span>.<span class='ident'>name</span>(<span class='ident'>name</span>).<span class='ident'>unwrap_or</span>(<span class='string'>""</span>).<span class='ident'>to_string</span>(), + <span class='prelude-val'>Ok</span>(<span class='ident'>i</span>) <span class='op'>=></span> <span class='self'>self</span>.<span class='ident'>at</span>(<span class='ident'>i</span>).<span class='ident'>unwrap_or</span>(<span class='string'>""</span>).<span class='ident'>to_string</span>(), + }) + }); + <span class='kw'>let</span> <span class='ident'>re</span> <span class='op'>=</span> <span class='ident'>Regex</span>::<span class='ident'>new</span>(<span class='string'>r"\$\$"</span>).<span class='ident'>unwrap</span>(); + <span class='ident'>re</span>.<span class='ident'>replace_all</span>(<span class='kw-2'>&</span><span class='ident'>text</span>, <span class='ident'>NoExpand</span>(<span class='string'>"$"</span>)) + } + + <span class='doccomment'>/// Returns the number of captured groups.</span> + <span class='attribute'>#[<span class='ident'>inline</span>]</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>len</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>usize</span> { <span class='self'>self</span>.<span class='ident'>locs</span>.<span class='ident'>len</span>() <span class='op'>/</span> <span class='number'>2</span> } + + <span class='doccomment'>/// Returns true if and only if there are no captured groups.</span> + <span class='attribute'>#[<span class='ident'>inline</span>]</span> + <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>is_empty</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='number'>0</span> } +} + +<span class='doccomment'>/// An iterator over capture groups for a particular match of a regular</span> +<span class='doccomment'>/// expression.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// `'t` is the lifetime of the matched text.</span> +<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>SubCaptures</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> { + <span class='ident'>idx</span>: <span class='ident'>usize</span>, + <span class='ident'>caps</span>: <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>Captures</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span>, +} + +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> <span class='ident'>Iterator</span> <span class='kw'>for</span> <span class='ident'>SubCaptures</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> { + <span class='kw'>type</span> <span class='ident'>Item</span> <span class='op'>=</span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span><span class='op'>></span>; + + <span class='kw'>fn</span> <span class='ident'>next</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='prelude-ty'>Option</span><span class='op'><</span><span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span><span class='op'>>></span> { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>idx</span> <span class='op'><</span> <span class='self'>self</span>.<span class='ident'>caps</span>.<span class='ident'>len</span>() { + <span class='self'>self</span>.<span class='ident'>idx</span> <span class='op'>+=</span> <span class='number'>1</span>; + <span class='prelude-val'>Some</span>(<span class='self'>self</span>.<span class='ident'>caps</span>.<span class='ident'>at</span>(<span class='self'>self</span>.<span class='ident'>idx</span> <span class='op'>-</span> <span class='number'>1</span>)) + } <span class='kw'>else</span> { + <span class='prelude-val'>None</span> + } + } +} + +<span class='doccomment'>/// An iterator over capture group positions for a particular match of a</span> +<span class='doccomment'>/// regular expression.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// Positions are byte indices in terms of the original string matched.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// `'t` is the lifetime of the matched text.</span> +<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>SubCapturesPos</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> { + <span class='ident'>idx</span>: <span class='ident'>usize</span>, + <span class='ident'>caps</span>: <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>Captures</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span>, +} + +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> <span class='ident'>Iterator</span> <span class='kw'>for</span> <span class='ident'>SubCapturesPos</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> { + <span class='kw'>type</span> <span class='ident'>Item</span> <span class='op'>=</span> <span class='prelude-ty'>Option</span><span class='op'><</span>(<span class='ident'>usize</span>, <span class='ident'>usize</span>)<span class='op'>></span>; + + <span class='kw'>fn</span> <span class='ident'>next</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='prelude-ty'>Option</span><span class='op'><</span>(<span class='ident'>usize</span>, <span class='ident'>usize</span>)<span class='op'>>></span> { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>idx</span> <span class='op'><</span> <span class='self'>self</span>.<span class='ident'>caps</span>.<span class='ident'>len</span>() { + <span class='self'>self</span>.<span class='ident'>idx</span> <span class='op'>+=</span> <span class='number'>1</span>; + <span class='prelude-val'>Some</span>(<span class='self'>self</span>.<span class='ident'>caps</span>.<span class='ident'>pos</span>(<span class='self'>self</span>.<span class='ident'>idx</span> <span class='op'>-</span> <span class='number'>1</span>)) + } <span class='kw'>else</span> { + <span class='prelude-val'>None</span> + } + } +} + +<span class='doccomment'>/// An Iterator over named capture groups as a tuple with the group</span> +<span class='doccomment'>/// name and the value.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// `'t` is the lifetime of the matched text.</span> +<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>SubCapturesNamed</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span>{ + <span class='ident'>caps</span>: <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>Captures</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span>, + <span class='ident'>inner</span>: <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>Iter</span><span class='op'><</span><span class='lifetime'>'t</span>, <span class='ident'>String</span>, <span class='ident'>usize</span><span class='op'>>></span>, +} + +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> <span class='ident'>Iterator</span> <span class='kw'>for</span> <span class='ident'>SubCapturesNamed</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> { + <span class='kw'>type</span> <span class='ident'>Item</span> <span class='op'>=</span> (<span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span>, <span class='prelude-ty'>Option</span><span class='op'><</span><span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span><span class='op'>></span>); + + <span class='kw'>fn</span> <span class='ident'>next</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span>(<span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span>, <span class='prelude-ty'>Option</span><span class='op'><</span><span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span><span class='op'>></span>)<span class='op'>></span> { + <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>inner</span>.<span class='ident'>as_mut</span>().<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>it</span><span class='op'>|</span> <span class='ident'>it</span>.<span class='ident'>next</span>()).<span class='ident'>unwrap_or</span>(<span class='prelude-val'>None</span>) { + <span class='prelude-val'>Some</span>((<span class='ident'>name</span>, <span class='ident'>pos</span>)) <span class='op'>=></span> <span class='prelude-val'>Some</span>((<span class='ident'>name</span>, <span class='self'>self</span>.<span class='ident'>caps</span>.<span class='ident'>at</span>(<span class='op'>*</span><span class='ident'>pos</span>))), + <span class='prelude-val'>None</span> <span class='op'>=></span> <span class='prelude-val'>None</span> + } + } +} + +<span class='doccomment'>/// An iterator that yields all non-overlapping capture groups matching a</span> +<span class='doccomment'>/// particular regular expression.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// The iterator stops when no more matches can be found.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// `'r` is the lifetime of the compiled expression and `'t` is the lifetime</span> +<span class='doccomment'>/// of the matched string.</span> +<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>FindCaptures</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> { + <span class='ident'>re</span>: <span class='kw-2'>&</span><span class='lifetime'>'r</span> <span class='ident'>Regex</span>, + <span class='ident'>search</span>: <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span>, + <span class='ident'>last_match</span>: <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>usize</span><span class='op'>></span>, + <span class='ident'>last_end</span>: <span class='ident'>usize</span>, +} + +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> <span class='ident'>Iterator</span> <span class='kw'>for</span> <span class='ident'>FindCaptures</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> { + <span class='kw'>type</span> <span class='ident'>Item</span> <span class='op'>=</span> <span class='ident'>Captures</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span>; + + <span class='kw'>fn</span> <span class='ident'>next</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>Captures</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>>></span> { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>last_end</span> <span class='op'>></span> <span class='self'>self</span>.<span class='ident'>search</span>.<span class='ident'>len</span>() { + <span class='kw'>return</span> <span class='prelude-val'>None</span> + } + + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>caps</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>re</span>.<span class='ident'>alloc_captures</span>(); + <span class='kw'>if</span> <span class='op'>!</span><span class='ident'>exec</span>(<span class='self'>self</span>.<span class='ident'>re</span>, <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>caps</span>, <span class='self'>self</span>.<span class='ident'>search</span>, <span class='self'>self</span>.<span class='ident'>last_end</span>) { + <span class='kw'>return</span> <span class='prelude-val'>None</span> + } + <span class='kw'>let</span> (<span class='ident'>s</span>, <span class='ident'>e</span>) <span class='op'>=</span> (<span class='ident'>caps</span>[<span class='number'>0</span>].<span class='ident'>unwrap</span>(), <span class='ident'>caps</span>[<span class='number'>1</span>].<span class='ident'>unwrap</span>()); + + <span class='comment'>// Don't accept empty matches immediately following a match.</span> + <span class='comment'>// i.e., no infinite loops please.</span> + <span class='kw'>if</span> <span class='ident'>e</span> <span class='op'>==</span> <span class='ident'>s</span> <span class='op'>&&</span> <span class='prelude-val'>Some</span>(<span class='self'>self</span>.<span class='ident'>last_end</span>) <span class='op'>==</span> <span class='self'>self</span>.<span class='ident'>last_match</span> { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>last_end</span> <span class='op'>>=</span> <span class='self'>self</span>.<span class='ident'>search</span>.<span class='ident'>len</span>() { + <span class='kw'>return</span> <span class='prelude-val'>None</span>; + } + <span class='self'>self</span>.<span class='ident'>last_end</span> <span class='op'>+=</span> <span class='self'>self</span>.<span class='ident'>search</span>[<span class='self'>self</span>.<span class='ident'>last_end</span>..].<span class='ident'>chars</span>() + .<span class='ident'>next</span>().<span class='ident'>unwrap</span>().<span class='ident'>len_utf8</span>(); + <span class='kw'>return</span> <span class='self'>self</span>.<span class='ident'>next</span>() + } + <span class='self'>self</span>.<span class='ident'>last_end</span> <span class='op'>=</span> <span class='ident'>e</span>; + <span class='self'>self</span>.<span class='ident'>last_match</span> <span class='op'>=</span> <span class='prelude-val'>Some</span>(<span class='self'>self</span>.<span class='ident'>last_end</span>); + <span class='prelude-val'>Some</span>(<span class='ident'>Captures</span>::<span class='ident'>new</span>(<span class='self'>self</span>.<span class='ident'>re</span>, <span class='self'>self</span>.<span class='ident'>search</span>, <span class='ident'>caps</span>)) + } +} + +<span class='doccomment'>/// An iterator over all non-overlapping matches for a particular string.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// The iterator yields a tuple of integers corresponding to the start and end</span> +<span class='doccomment'>/// of the match. The indices are byte offsets. The iterator stops when no more</span> +<span class='doccomment'>/// matches can be found.</span> +<span class='doccomment'>///</span> +<span class='doccomment'>/// `'r` is the lifetime of the compiled expression and `'t` is the lifetime</span> +<span class='doccomment'>/// of the matched string.</span> +<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>FindMatches</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> { + <span class='ident'>re</span>: <span class='kw-2'>&</span><span class='lifetime'>'r</span> <span class='ident'>Regex</span>, + <span class='ident'>search</span>: <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span>, + <span class='ident'>last_match</span>: <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>usize</span><span class='op'>></span>, + <span class='ident'>last_end</span>: <span class='ident'>usize</span>, +} + +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> <span class='ident'>Iterator</span> <span class='kw'>for</span> <span class='ident'>FindMatches</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> { + <span class='kw'>type</span> <span class='ident'>Item</span> <span class='op'>=</span> (<span class='ident'>usize</span>, <span class='ident'>usize</span>); + + <span class='kw'>fn</span> <span class='ident'>next</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span>(<span class='ident'>usize</span>, <span class='ident'>usize</span>)<span class='op'>></span> { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>last_end</span> <span class='op'>></span> <span class='self'>self</span>.<span class='ident'>search</span>.<span class='ident'>len</span>() { + <span class='kw'>return</span> <span class='prelude-val'>None</span> + } + + <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>caps</span> <span class='op'>=</span> [<span class='prelude-val'>None</span>, <span class='prelude-val'>None</span>]; + <span class='kw'>if</span> <span class='op'>!</span><span class='ident'>exec</span>(<span class='self'>self</span>.<span class='ident'>re</span>, <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>caps</span>, <span class='self'>self</span>.<span class='ident'>search</span>, <span class='self'>self</span>.<span class='ident'>last_end</span>) { + <span class='kw'>return</span> <span class='prelude-val'>None</span>; + } + <span class='kw'>let</span> (<span class='ident'>s</span>, <span class='ident'>e</span>) <span class='op'>=</span> (<span class='ident'>caps</span>[<span class='number'>0</span>].<span class='ident'>unwrap</span>(), <span class='ident'>caps</span>[<span class='number'>1</span>].<span class='ident'>unwrap</span>()); + + <span class='comment'>// Don't accept empty matches immediately following a match.</span> + <span class='comment'>// i.e., no infinite loops please.</span> + <span class='kw'>if</span> <span class='ident'>e</span> <span class='op'>==</span> <span class='ident'>s</span> <span class='op'>&&</span> <span class='prelude-val'>Some</span>(<span class='self'>self</span>.<span class='ident'>last_end</span>) <span class='op'>==</span> <span class='self'>self</span>.<span class='ident'>last_match</span> { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>last_end</span> <span class='op'>>=</span> <span class='self'>self</span>.<span class='ident'>search</span>.<span class='ident'>len</span>() { + <span class='kw'>return</span> <span class='prelude-val'>None</span>; + } + <span class='self'>self</span>.<span class='ident'>last_end</span> <span class='op'>+=</span> <span class='self'>self</span>.<span class='ident'>search</span>[<span class='self'>self</span>.<span class='ident'>last_end</span>..].<span class='ident'>chars</span>() + .<span class='ident'>next</span>().<span class='ident'>unwrap</span>().<span class='ident'>len_utf8</span>(); + <span class='kw'>return</span> <span class='self'>self</span>.<span class='ident'>next</span>() + } + <span class='self'>self</span>.<span class='ident'>last_end</span> <span class='op'>=</span> <span class='ident'>e</span>; + <span class='self'>self</span>.<span class='ident'>last_match</span> <span class='op'>=</span> <span class='prelude-val'>Some</span>(<span class='self'>self</span>.<span class='ident'>last_end</span>); + <span class='prelude-val'>Some</span>((<span class='ident'>s</span>, <span class='ident'>e</span>)) + } +} + +<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"pattern"</span>)]</span> +<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>RegexSearcher</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> { + <span class='ident'>it</span>: <span class='ident'>FindMatches</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span>, + <span class='ident'>last_step_end</span>: <span class='ident'>usize</span>, + <span class='ident'>next_match</span>: <span class='prelude-ty'>Option</span><span class='op'><</span>(<span class='ident'>usize</span>, <span class='ident'>usize</span>)<span class='op'>></span>, +} + +<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"pattern"</span>)]</span> +<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> <span class='ident'>Pattern</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> <span class='kw'>for</span> <span class='kw-2'>&</span><span class='lifetime'>'r</span> <span class='ident'>Regex</span> { + <span class='kw'>type</span> <span class='ident'>Searcher</span> <span class='op'>=</span> <span class='ident'>RegexSearcher</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span>; + + <span class='kw'>fn</span> <span class='ident'>into_searcher</span>(<span class='self'>self</span>, <span class='ident'>haystack</span>: <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span>) <span class='op'>-></span> <span class='ident'>RegexSearcher</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> { + <span class='ident'>RegexSearcher</span> { + <span class='ident'>it</span>: <span class='self'>self</span>.<span class='ident'>find_iter</span>(<span class='ident'>haystack</span>), + <span class='ident'>last_step_end</span>: <span class='number'>0</span>, + <span class='ident'>next_match</span>: <span class='prelude-val'>None</span>, + } + } +} + +<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"pattern"</span>)]</span> +<span class='kw'>unsafe</span> <span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> <span class='ident'>Searcher</span><span class='op'><</span><span class='lifetime'>'t</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>RegexSearcher</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='lifetime'>'t</span><span class='op'>></span> { + <span class='attribute'>#[<span class='ident'>inline</span>]</span> + <span class='kw'>fn</span> <span class='ident'>haystack</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='kw-2'>&</span><span class='lifetime'>'t</span> <span class='ident'>str</span> { + <span class='self'>self</span>.<span class='ident'>it</span>.<span class='ident'>search</span> + } + + <span class='attribute'>#[<span class='ident'>inline</span>]</span> + <span class='kw'>fn</span> <span class='ident'>next</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>SearchStep</span> { + <span class='kw'>if</span> <span class='kw'>let</span> <span class='prelude-val'>Some</span>((<span class='ident'>s</span>, <span class='ident'>e</span>)) <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>next_match</span> { + <span class='self'>self</span>.<span class='ident'>next_match</span> <span class='op'>=</span> <span class='prelude-val'>None</span>; + <span class='self'>self</span>.<span class='ident'>last_step_end</span> <span class='op'>=</span> <span class='ident'>e</span>; + <span class='kw'>return</span> <span class='ident'>SearchStep</span>::<span class='ident'>Match</span>(<span class='ident'>s</span>, <span class='ident'>e</span>); + } + <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>it</span>.<span class='ident'>next</span>() { + <span class='prelude-val'>None</span> <span class='op'>=></span> { + <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>last_step_end</span> <span class='op'><</span> <span class='self'>self</span>.<span class='ident'>haystack</span>().<span class='ident'>len</span>() { + <span class='kw'>let</span> <span class='ident'>last</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>last_step_end</span>; + <span class='self'>self</span>.<span class='ident'>last_step_end</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>haystack</span>().<span class='ident'>len</span>(); + <span class='ident'>SearchStep</span>::<span class='ident'>Reject</span>(<span class='ident'>last</span>, <span class='self'>self</span>.<span class='ident'>haystack</span>().<span class='ident'>len</span>()) + } <span class='kw'>else</span> { + <span class='ident'>SearchStep</span>::<span class='ident'>Done</span> + } + } + <span class='prelude-val'>Some</span>((<span class='ident'>s</span>, <span class='ident'>e</span>)) <span class='op'>=></span> { + <span class='kw'>if</span> <span class='ident'>s</span> <span class='op'>==</span> <span class='self'>self</span>.<span class='ident'>last_step_end</span> { + <span class='self'>self</span>.<span class='ident'>last_step_end</span> <span class='op'>=</span> <span class='ident'>e</span>; + <span class='ident'>SearchStep</span>::<span class='ident'>Match</span>(<span class='ident'>s</span>, <span class='ident'>e</span>) + } <span class='kw'>else</span> { + <span class='self'>self</span>.<span class='ident'>next_match</span> <span class='op'>=</span> <span class='prelude-val'>Some</span>((<span class='ident'>s</span>, <span class='ident'>e</span>)); + <span class='kw'>let</span> <span class='ident'>last</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>last_step_end</span>; + <span class='self'>self</span>.<span class='ident'>last_step_end</span> <span class='op'>=</span> <span class='ident'>s</span>; + <span class='ident'>SearchStep</span>::<span class='ident'>Reject</span>(<span class='ident'>last</span>, <span class='ident'>s</span>) + } + } + } + } +} + +<span class='kw'>fn</span> <span class='ident'>exec</span>(<span class='ident'>re</span>: <span class='kw-2'>&</span><span class='ident'>Regex</span>, <span class='ident'>caps</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>CaptureIdxs</span>, <span class='ident'>text</span>: <span class='kw-2'>&</span><span class='ident'>str</span>, <span class='ident'>start</span>: <span class='ident'>usize</span>) <span class='op'>-></span> <span class='ident'>bool</span> { + <span class='kw'>match</span> <span class='op'>*</span><span class='ident'>re</span> { + <span class='ident'>Regex</span>::<span class='ident'>Native</span>(<span class='ident'>ExNative</span> { <span class='kw-2'>ref</span> <span class='ident'>prog</span>, .. }) <span class='op'>=></span> (<span class='op'>*</span><span class='ident'>prog</span>)(<span class='ident'>caps</span>, <span class='ident'>text</span>, <span class='ident'>start</span>), + <span class='ident'>Regex</span>::<span class='ident'>Dynamic</span>(<span class='kw-2'>ref</span> <span class='ident'>prog</span>) <span class='op'>=></span> <span class='ident'>prog</span>.<span class='ident'>exec</span>(<span class='ident'>caps</span>, <span class='ident'>text</span>, <span class='ident'>start</span>), + } +} +</pre> +</section> + <section id='search' class="content hidden"></section> + + <section class="footer"></section> + + <div id="help" class="hidden"> + <div class="shortcuts"> + <h1>Keyboard shortcuts</h1> + <dl> + <dt>?</dt> + <dd>Show this help dialog</dd> + <dt>S</dt> + <dd>Focus the search field</dd> + <dt>⇤</dt> + <dd>Move up in search results</dd> + <dt>⇥</dt> + <dd>Move down in search results</dd> + <dt>⏎</dt> + <dd>Go to active search result</dd> + </dl> + </div> + <div class="infos"> + <h1>Search tricks</h1> + <p> + Prefix searches with a type followed by a colon (e.g. + <code>fn:</code>) to restrict the search to a given type. + </p> + <p> + Accepted types are: <code>fn</code>, <code>mod</code>, + <code>struct</code>, <code>enum</code>, + <code>trait</code>, <code>typedef</code> (or + <code>tdef</code>). + </p> + <p> + Search functions by type signature (e.g. + <code>vec -> usize</code>) + </p> + </div> + </div> + + + + <script> + window.rootPath = "../../"; + window.currentCrate = "regex"; + window.playgroundUrl = ""; + </script> + <script src="../../jquery.js"></script> + <script src="../../main.js"></script> + + <script async src="../../search-index.js"></script> +</body> +</html>
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